I loved the character design of SF3 and I especially loved how they pretty much threw out everyone except Ryu and Ken. I wish they had clipped out Akuma as well, but ...eh. whatever.
Dudley was an awesome boxer character, something that caught me off guard when I initially thought that he'd just be another Balrog (who I'm not much of a fan of). Yun and Yang are enjoyable kung fu characters, Ibuki is far and away my favorite female SF character, I can't believe anyone would shit on Elena, Hugo is Hugo (which is very good), and while I feel a little gay picking him, Urien is quite the pimp. Sean was the Dan and Q was my favorite new fighter in third strike.
Shit, the only characters I just did not like were Chun Li (bleh), Twelve (double bleh), Remy (eurotrash shit), and Necro (go join the cast of Vampire Savior, fucker).