**Open Source - The entire source for loading, animating, etc is available through Quake III's source files
*****Well Documented - Probably one of the best documented on the net
**Level of Details are built in
**Supports parent/child based animation
*****Animations can be named to follow .mid events
**Lots of pre-built models - Plug n' Play Quake 3 models
**A large community of pros. Makes it easy to create and animate any model
**Lots of free tools. No need to buy 3DSMax to create content
**Quake III's shader system could also be ported, allowing for bumpmaps, specular maps, etc.
**Would work for characters, guitars and stages
**Animations are keyframe-based, meaning any idiot can build them
.