I pretty much agree with Lovro and Becka, e.g., I hope we don't do custom avatars. One thing I find annoying at some sites are the intrusive Avatars. A BBS is for posting, not gaudy icons.
Well, if custom avatars are even remotely being considered, they sould be restricted to :
1. 60x60 Pixels (larger is intrusive... should be a "calling card" for a poster, not a distraction or page delayer!).
2. Two (2) K maximum!! Nothing larger is necessary. Really, one (1) K should be the norm, but 2 K to be charitable.
2. Non-animated.
3. Non-offensive (the usual... no swastikas, no religious desecrations, blah blah)
4. Post count (somewhere from 1,000 to 2,000 range).
5. In good standing.
#5 would be an option for Mod discussion, e.g., deny/remove user custom avatar for improper behavior. Also, if a member was Perm-banned, it would be removed.