Yeah. I'm gonna go with any season except for the newest one or Season 1 or 2. The newest season was sort of a mess to be frank. It's understandable, but still...doesn't inspire much hope for the future of the show.
Seasons 3-9 are actually all great though. Every single one has a stone cold classic.
Honestly such an underrated show. It's really not a Seth McFarlane show besides featuring him. It's the only one he doesn't contribute to the writing at all !! It deserves more credit instead of just being written off with Family Guy and Cleveland Show as Seth McFarlane product.
The newest season is generally way funnier now they've moved to TBS and aren't filtered as much as they were on Fox. I love all seasons though, but S3 onwards >>>>>