SFist is now taking votes for the worst MUNI line. The finalists:
I've had considerable experience with the 22, the 30, and the J. They're all bad, but for different reasons (the 22 - crowded, smelly, takes forever; the 30 - mostly just crowded; the J - never around).
If forced to select one of those, it would be the 22 (which I thankfully haven't had to ride in quite some time). I'm picking the 38 to win the whole thing though.