Spoiler: I know Bones and Booth end up living together, but I'm about halfway through Season 6 and it's a slog to watch. He's with Hannah, Bones cracks silly jokes and the cases are pedestrian at best. Trouble is, I really like Hannah, even if I find her friendship with Bones a bit of a stretch. So on the one hand, I don't want them to break up, but on the other, I can't wait for the story arc to reach a more satisfying point.
In many ways, I still find Series 1 the best. I loved Zack and Dr Goodman.