[a href="http://www.sluggy.com"]Sluggy Freelance[/a] one of the oldest and therefore longest running webcomics around. Recently just turned 14 years old. That should provide you with a lot of entertainment, their backlogs go on for quite some time, and range from silly non-serious stories to long branching narratives, all in web comic form. This was a pioneer web comic, paving the way for others that came after it.
[a href="http://www.questionablecontent.net"]Questionable Content[/a]A web comic for indie hipsters, though it's lack of pretentiousness means others can enjoy it as well. The cute and\or perverted robots don't hurt either. Lots of female characters, none of them loose, one has OCD and is ADORABLE. The art style has really evolved over the years, for the better I might add.
I'm sure you've been introduced to vg cats and XKCD, so I won't bother.
One last one, [a href=http://www.weregeek.com]Weregeek[/a], a webcomic about a guy coming to terms and enjoying the fact that he is a geek . . . but he's hunted by a group of anti-geek Hunters who want to destroy Geekdom. Oh, and apparently when he and his friends geek out, they get super powers, though most of them don't know it. Story switches between their lives in the real world, and their other RPG\cos-play games. Cute, funny, and has lots of geek quotes to enjoy.
