Webcomics

Anyone know any good webcomics? I have a lot of spare time to fill and need a distraction from my mind numbing boredom. I've already read Questionable Content and am up to date with Homestuck (they're both great I highly recommend them).

How about mine

In order of my personal preference:

1. xkcd - Math, science, sarcasm and stufz.

2. UserFriendly - A webcomic chronicling the antics of the employees of Columbia Internet. Officially ended back in 2007 or so, but I like to read through the archives. Really good.

3. Three Panel Soul - Every single strip has exactly three panels, and they don't seem to be in any order or to be related very much, yet it's the deepest comic series I've ever read. Read it now.

4. Problem Sleuth - If you're up to date on HS you've probably already read PS, but if you haven't go do it now.

5. Homestuck - you said you're up to date on this, requires no explanation.

6. Sweet Bro And Hella Jeff - If you want to catch Down syndrome, this is the way to do it.

I managed to miss this thread somehow. The only ones I keep track of are:
xkcd (already mentioned)
Saturday Morning Breakfast Cereal (similar to xkcd, very science oriented)
Cyanide and Happiness (basically potty humor compared to the first two. Very strange but usually funny. Don't go if you're easily offended. I don't think there's a single demographic they haven't tried to offend at some point.)
Penny Arcade (I often don't understand this. It requires you to be very aware of current Internet culture and news and stuff. Tends to be videogame oriented. Interesting in part because they've been doing it since the 90s, before the Internet was even really a thing.)
The Oatmeal (consistently the funniest of any of them, but because of that the guy is rich enough that he no longer has to post new comics except when he wants to, which is usually once a month or so. He's been productive recently, but usually I just check this every week or so to see if there's new stuff.)