Community - Never get tired of re-watching Season 1-5 (yes even the gas leaks season). I love all the characters, the themes, the positive lessons throughout the shows, and the character growth as they aged. The way the show weaves storylines through its characters is so well done, it makes episodes feel satisfying. Can't wait for the movie to put the cherry on top of it all, maybe if it does well they make a trilogy. I could watch them play D&D in this world for hours!
30 Rock - Smart, witty, entertaining characters and dialogue, really easy to rewatch.
Parks and Rec - I liked a lot of this show, but there were characters and parts that bug me. The first season and the last 1-2 were pretty weak overall, but lots of good stuff in its prime.
Big Bang Theory - I enjoy the nerd-face and the comedy that slap on it. It's cheap, low effort and hollow, but it's a Chuck Lorre sitcom, so that should be expected.
Modern Family - Ehhh, never found this show to be all that hilarious. I watched it for a couple seasons when it started back in 2009 well before I had kids, so maybe watching it now would make me appreciate it more.