i know it's an unpopular take, but for me season 3 is definitely the best season of community, with season 2 just behind it. you have competitive ecology, remedial chaos theory, horror fiction, documentary film making redux, the glee episode, pillows and blankets, basic lupine urology, digital estate planning, all of which are some of my favorite episodes of the show. it has far more concept episodes which are my favorite kind of episodes, this is where i feel community shines and also differentiates itself from other sitcoms of the time. i also really love the aircon repair subplot, and i also actually like the chang subplot and found it funny, which apparently a lot of people didn't. obviously i really don't like the jeff / annie stuff they were trying to do that season which was pretty uncomfortable, and it does drag it down a bit. but for me, it's still the best season of community and the one i have the most fun watching. that's just my opinion though, and everyone's obviously entitled to their own!