I really loved Faith and the Mayor was funny too. I loved the whole concept of good slayer/bad slayer and thought it was really well written, especially when what drove Faith to evil was human insecurities, she wanted attention and acceptance and just felt like an outsider but the Mayor made her feel wanted. The Mayor was just a funny big bad too.
I thought William the Bloody pre soppy I'm in love with Buffy and I have a chip was excellent too, season 2 was just great with spike and Dru.