A modpack that aims to improve and extend the vanilla experience:

Eyes of Ender will no longer be able to activate the end portal, instead you will need to collect unique eggs from various vanilla structures and by killing mobs (End Remastered).
A lot of vanilla structures are also remodeled and provide a new challenge for veteran vanilla players (YUNG's mods).
Lots of exciting mobs to be found that interact with their environment (Naturalist).
A bunch of furniture (Another Furniture, Paladin's Furniture and Beautify!) and food items (Farmer's Delight) have also been added.
Archeology is improved, new artifacts added (Better Archeology).
There are a lot of other small tweaks and QoL features included.
As of 1.8, it also includes the WATERFrAMES mod, which adds TVs and a projector that you can watch online videos and lives on.
The many performance mods ensure a much smoother and more optimized experience than vanilla.

(Anyone is completely free to modify and repack. I do not own any of the mods, it is only a modpack for personal use.)

Mod List (1.9):

(The Barebones versions are pretty much the same, just without all the content mods, and a bunch of the utility mods.)

Content (Function):

Amendments (by plantspookable)
Boids (by Tomate0613)
Connectible Chains [Fabric] (by legoatoom)
Diagonal Fences [Forge & Fabric] (by Fuzs)
Diagonal Walls (by Fuzs)
Easy Anvils [Forge & Fabric] (by Fuzs)
Easy Magic [Forge & Fabric] (by Fuzs)
Easy Shulker Boxes [Forge & Fabric] (by Fuzs)
Harvest with ease (by CrystalSpider)
Shiny Horses - Enchantable Horse Armor (by Dragonostic)
You're in Grave Danger (by b1n_ry)

Content (Generation):

Amplified Nether (by Starmute)
Better Archeology (by Pandarix)
Geophilic – Vanilla Biome Overhauls (by bebebea_loste)
MES - Moog's End Structures (by finndog_123)
MNS - Moog's Nether Structures (by finndog_123)
Nullscape (by Starmute)
The Bastion Overhaul (by nikeyso)
Tidal Towns (by joshieman)
YUNG's Better Desert Temples (Fabric) (by YUNGNICKYOUNG)
YUNG's Better Dungeons (Fabric) (by YUNGNICKYOUNG)
YUNG's Better End Island (Fabric) (by YUNGNICKYOUNG)
YUNG's Better Jungle Temples (Fabric) (by YUNGNICKYOUNG)
YUNG's Better Mineshafts (Fabric) (by YUNGNICKYOUNG)
YUNG's Better Nether Fortresses (Fabric) (by YUNGNICKYOUNG)
YUNG's Better Ocean Monuments (Fabric) (by YUNGNICKYOUNG)
YUNG's Better Strongholds (Fabric) (by YUNGNICKYOUNG)
YUNG's Better Witch Huts (Fabric) (by YUNGNICKYOUNG)

Content (Item):

Another Furniture (by Starfish_Studios)
Beautify: Refabricated (by Suel_ki)
Bucket'Em (by Qzimyion)
Comforts (Fabric/Forge/Quilt) (by TheIllusiveC4)
End Remastered [Fabric] (by jack_bagel)
Farmer's Delight Refabricated (by MerchantPug)
Global XP (by bl4ckscor3)
Guarding (by exdrill_10)
Joy of Painting (by xerca0)
Macaw's Fences and Walls (by sketch_macaw)
Macaw's Paintings (by sketch_macaw)
Map Atlases [Fabric] (by Pepperoni__Jabroni__)
More Terracotta (by BabarKhan)
NiftyCarts (by jmb19905)
Night Lights (by joosh_7889)
Paladin's Furniture (by UnlikePaladin)
Sawmill (by MehVahdJukaar)
Slabs & Layers+ (by ACgamer_real)
Sleep Tight (by plantspookable)
Storage Labels (by MehVahdJukaar)
Supplementaries (by MehVahdJukaar)
Torches in Water (by Phoupraw)
Vertical Slabs Compat (by MehVahdJukaar)
WATERFrAMES: Media Displays (by SrRapero720)

Content (Mob):

Naturalist (by Starfish_Studios)
Savage Ender Dragon[Forge/Fabric] (by someaddon)

Utility:

AFK Display (by Vanilla Tweaks)
AppleSkin (by squeek502)
Better Advancements (by way2muchnoise)
Better Ping Display [Fabric] (by Quintinity)
Better Statistics Screen (by TheCSDev)
Companion 🐕 (Fabric) (by Snownee)
Controlling (by Jaredlll08)
Cut Through (by Fuzs)
Cycle Paintings (by Serilum)
Double Doors (by Serilum)
Elytra/Chestplate Swapper (Fabric) (by Saphjyr)
Freecam (Fabric/Forge) (by hashalite)
Held Item Tooltips [Forge & Fabric] (by Fuzs)
Horse Buff (by F53)
Inventory Totem (by Serilum)
InvMove (by PieKing1215)
Jade 🔍 (by Snownee)
Leave My Bars Alone (by Fuzs)
Map Tooltip (by VendoAU)
MiniHUD (by masady)
Mod Menu (by Prospector)
Mouse Tweaks (by YaLTeR)
Pick Up Notifier [Forge & Fabric] (by Fuzs)
Plague's Chat Timestamps (by plague1337tr)
Reacharound (by spAnser)
Roughly Enough Items Fabric/Forge/NeoForge (REI) (by shedaniel)
Screenshot Viewer (by LGatodu47)
Shifty Hotbar (by Kir_Antipov)
Stack Refill (by Serilum)
Structure Essentials[Forge/Fabric] (by someaddon)
Stylish Effects (by Fuzs)
Universal Bone Meal [Forge & Fabric] (by Fuzs)
Villager Names (by Serilum)
Yeetus Experimentus (by Sunekaer)
Zoomify (by XanderIsDev)

Visual:

Better Third Person (by Socolio)
BSL Shaders (by capttatsu)
Continuity (by Pepper_Bell)
Do a Barrel Roll (by enjarai)
Eating Animation [Fabric] (by theone_ss)
Explosive Enhancement (by Superkat32)
Falling Leaves (Fabric) (by RandomMcSomethin)
First-person Model (Forge/Fabric) (by tr7zw)
Fresh Animations (by FreshLX)
Fresh Animations Extensions (by FreshLX)
Iris Shaders (by coderbot)
Make Bubbles Pop [Client] [Forge/Fabric/Quilt] (by Tschipcraft)
Not Enough Animations (by tr7zw)
Particle Rain (by PigCart)
Seamless (by LarsMans)
Simple Grass Flowers (by JamieProbably)
Skin Layers 3D (Fabric/Forge) (by tr7zw)
Vanilla Tweaks Resource Pack (Custom) (by Vanilla Tweaks)

Sound:

AmbientSounds 6 (by CreativeMD)
Auditory Continued (by Syfe)
Presence Footsteps (by S0llace)
Simple Voice Chat (by henkelmax)
Sound Physics Remastered (by henkelmax)

Performance:

Chunk Sending[Forge/Fabric] (by someaddon)
Clumps (by Jaredlll08)
Connectivity[Forge/Fabric] (by someaddon)
Cull Less Leaves (by XanderIsDev)
Dynamic FPS (by juliand665)
Enhanced Block Entities (by FoundationGames)
Entity Culling Fabric/Forge (by tr7zw)
Fast Paintings (by MehVahdJukaar)
FerriteCore (Fabric) (by malte0811)
ImmediatelyFast (by RaphiMC)
Let Me Despawn (by frikinjay)
Lithium (Fabric) (by JellySquid)
Server Performance - Smooth Chunk Save[Forge/Fabric] (by someaddon)
Sodium (by JellySquid)
Starlight (Fabric) (by Spottedstar)

Other:

Autocrafter Early (by QuackImpala7321)
Copper & Tuff Backport (from 1.21) [Fabric | Forge] (by XanthianZ)
CraftTweaker (by Jaredlll08)
Debugify (by XanderIsDev)
On Soul Fire (by MoriyaShiine)

Dependency:

[EMF] Entity Model Features [Fabric & Forge] (by traben_0)
[ETF] Entity Texture Features - [Fabric & Forge] (by traben_0)
Architectury API (Fabric/Forge/NeoForge) (by shedaniel)
Cardinal Components API (by UpcraftLP)
CICADA (by enjarai)
Cloth Config API (Fabric/Forge/NeoForge) (by shedaniel)
Collective (by Serilum)
CreativeCore (by CreativeMD)
Cupboard (by someaddon)
Fabric API (by modmuss50)
Fabric Language Kotlin (by modmuss50)
FastConfigAPI (by infinituum17)
Faux Custom Entity Data (by Jaredlll08)
Forge Config API Port (by Fuzs)
GeckoLib (by Gecko)
Indium (by comp500)
InvMoveCompats (by PieKing1215)
MaLiLib (by masady)
Moonlight Lib (by MehVahdJukaar)
Paxi (Fabric) (by YUNGNICKYOUNG)
Puzzles Lib [Forge & Fabric] (by Fuzs)
Searchables (by Jaredlll08)
WATERMeDIA: Multimedia API (by SrRapero720)
YetAnotherConfigLib (by XanderIsDev)
YUNG's API (Fabric) (by YUNGNICKYOUNG)

Sivzzz' Vision