Oh god, I don't know if I can pick ;-;
Alright, top 5:
1.) Fail by Error
2.) Two Guys and Guy
3.) Awkward Zombie
4.) Fisheye Placebo
(note that not all of these are on Tapastic; AZ, HappleTea, and TwoGaG aren't). Monster Pop is also starting to make it into my top 5 cause I'm liking it a lot right now > w >
Favorite comic of all time though is hands down, Calvin and Hobbes. The only reason it's not at the top of that list is because it's not a webcomic.