The behaviors of the group of guys were just every nerd/geek trope imaginable. It was just, ugh, annoying to watch. "Production values" of the show didn't strike me as great either. Granted, it's a sitcom but, man, it was just ugly to watch. I'm glad I don't watch sitcoms anymore. I did find the B-Story with the girls trying to get into comic-books and understand Thor's hammer and getting into a nerdy discussion over it. I wish the episode had been about that rather than this tenuous Star Trek connection nonsense.
Along with 2 1/2 men, it's the Micky D's of sitcoms. I've got a pretty broad sense of humor, I like my low brow and my high brow, slapstick, or whatever...but BBT is one of those shows where I'm ahead of every joke. It's predictable. I guess some find that comforting and just want to switch off at the end of the day but I want to be engaged on some level at least. Just like Trek 2009, it's written for a very different mind set...although to be fair, Trek 2009 had enough redeeming qualities for me to enjoy it at least.