I have an idea for campaign in my head but I need to find a good system to run it. Main thing I want is a system that would allow people to play humans, humanoids, and non-humans, with enough system and character customization depth to make the differences feel interesting and meaningful. Basically, if a player wants to be a fire magic-wielding phoenix or a psychic cat, they should be able to do that.
Ideally the system would also have at least some level of support for typical fantasy adventuring stuff (dungeon crawling, combat, social intrigue, etc.)
There are many GURPS genre books which can help with building nonhuman characters - Space, Fantasy, there's even a recent Furries book for anthropomorphic nonhumans, the old 3e Monsters/Shifters books are, well, less helpful but neat.
The Technomancer setting (really neat modern day magic setting, albeit one that drops the line "a resurrected Stalin fights to take back control of the USSR" and barely follows up on it - the Penguin Hivemind gets more attention) has a half dozen human-animal chimaera races that were updated in a later issue of Pyramid.