ooh, hurm... Questionable Content is a refreshing slice-of-life comic Awkward Zombie and GG-Guys are pretty good gaming webcomics xkcd is just great, same goes for The Adventures of Dr. McNinja Rooster Teeth also has a good webcomic... I can't decide on a favorite though.
I was just wondering if anyone on the vine was a troper. If you don't know, TV Tropes is like... an index of tropes seen throughout media: http://tvtropes.org/pmwiki/pmwiki.php/Main/HomePage It's rather quite entertaining