Adventures Origin

Adventures Origin is a modpack that while small, still has quite a bit to it.

Starting with Origins, a mod that allows you to choose a starting race, this mod alone allows many players to choose their own gameplay style.
Even more, Adventures Origin comes with plenty of addons to Origins, including a few custom races, and even a mod that adds classes as well.

Beyond that, with tons of dungeons and other exploration addons exploring the world has never been more interactive.

All of this packaged together with a few tech based mods like Industrial Revolution, even for those more interested in increasing productivity, this modpack has it all.

Or if you're more interested in combat, Bosses of Mass Destruction might be more your style.