There are a lot of webcomics on the net. Some are good, some are not. I will try to publish some of the best. That is, of course, just my opinion and they might as well be plain stupid to you.
I'm open for suggestions.
Oglaf - Dirty and hilarious. Mature content.
xkcd - Humour spiced with facts, internet and science.
Dr. McNinja - Story-driven webcomic.
Axe Cop - Webcomic written by a 5-year and illustrated by his 29-year old bro.
Evil Diva - Devil cursed with urges to be nice.
Goblins - Life from goblins' perspective.
Dresden codak - Looks interesting. Mulitple chars.