The Big Bang Theory after seasons the first two seasons. Initially, it was great, but like all geek-nerd (and for most of my life I've been put in one of those two groups. Well, kind of.) shows, it just runs out of material, because there's only so many jokes that can be made, quite honestly. I haven't watched it in a while because it's not funny anymore, and it's become more of a relationship based show, which was never its premise. The character development is pathetic, as well. Take Sheldon, for example. In the first couple of seasons, his quirks and strange idiosyncrasies were hilarious, but now they're just forced and not funny, especially with his laugh. It's like they're trying to hard, and, getting back to Sheldon again, everything he does seems terribly contrived. It worked for the first few seasons, but it's just terrible now, imo.