Alot of people seem to still have hopes for Spike, becoming a serious character. Not me. I gave up on him for a long time and i believe if he has an episode in S6, it's going to suck again.
Spike was meant to be sort of... a comic relief (Kind of like Humdrum from Power Ponies in Season 4, Episode 6.) He's still funny, and I'm glad he's still part of the show, but I think he's becoming more and more of a background character now, which I'm pretty sad about.