Animate the default unit-frame portraits with minimal side effects and without user configuration. Unlike other similar add-ons, this preserves the appearance of the baseline Blizzard portraits, including in particular the circular shape.
- Indistinguishable from baseline portraits (apart from being animated, of course)
- Simple: no user configuration
- Lightweight
- Supports both Mainline and Classic (but I do not have access to Forever yet)

Limitations
- In mainline (retail), instance mobs are considered "secret", and thus their portraits are not animated. Trying to see if I can do something about this…
- Only one portrait is animated if two are very close together. Custom UI layouts may have to be adapted for optimal results - Technical limitation by Blizzard: UI models occlude each other when intersecting
- Compatibility not guaranteed (but possible) with add-ons that alter unit frames or other portrait frames

