I won't say which I think are terrible or overrated but I can say one that I used to enjoy but drifted away from - Ctrl-Alt-Del.

I know it tends to be the 'bad guy' of the webcomics world due to Buckley's infamous reactions but that's not why I quit reading. I just wasn't feeling the jokes like I used to. Same could be said for Penny Arcade but I've found myself hitting up the PA site for other things. With CAD... not so much. I do still try to celebrate Wintereenmas when I can. = )

I know, not the same as overrated or terrible but that's the best I'll got.