Here are some comics that I really like. I think these are pretty great and that you should probably read them too. (I’m probably forgetting a few, so forgive me while I get my act together…):

Bad Machinery
Bird Boy

Boxer Hockey
Copper
Cucumber Quest
Dinosaur Comics
Dresden Codak
Gunnerkrigg Court
Hark! A Vagrant
Johnny Wander
Mac Hall
The Meek
MS Paint Adventures
Nedroid
Octopus Pie
Penny Arcade
Questionable Content
Rice Boy
Sam and Fuzzy
Three Panel Soul
Wondermark
xkcd