Okay, so I simple made this thread so that people can share good webcomics that they know.

Here is my personal Webcomic Repertoire:
User Friendly
Schlock Mercenary
Ctrl-Alt-Delete
Last Days of FOXHOUND
Dudley's Dungeon
Joy of Tech
The Creatures In My Head
Chugworth Academy
Order of the Stick
Looking For Group
Perry Bible Fellowship
xkcd

Share yours!

Currently (although its ever expanding...)
Order of the Stick
Docter McNinja
Dinosaur Comics (Qwantz)
Questionable Content
Crap I drew on my Lunch Break
Whiteninja
Minus
Thinkin' Lincoln
Loserz
Wigu
Overcompensating
Ctrl Alt Delete
Dresden Codak
Diesel Sweeties
Edwitch
Perry Bible Fellowship
Scary Go Round
VG Cats
Copper
Stuff Sucks
Uber Galexy
A Divine Dramedy
Gunnerkrigg Court

Really only ever Looking for Group and VGCats nowadays. Both so very hilarious...

I read 8-bit Theater and Penny Arcade.

Least I Could Do
PvP Online
Ctrl-Alt-Del
VGCats
Duelling Analogs
TheNoobComic
Order of the Stick (sometimes)
8-bit theatre (sometimes)

No one here reads Sluggy, Adventurers!, or Sabrina Online ?

In order of consistent awesomeness(the urls aren't very hard to figure out and I'm lazy):
Dr McNinja
Order of the Stick
Ctrl+Alt+Del
Dueling Analogs
Something Positive
Comet7 (this used to be my favourite but it's not quite as funny to me recently)
Megatokyo
Questionable Content
the outer circle

Looking for Group is definitely at the top somewhere but haven't really decided where because it's pretty new... Same with 1/0 except because it actually ended..

Adventurers! is no longer updating.

My list:
Ctl-Alt-Del
8-Bit Theatre
Megatokyo
The Noob
Order of the Stick
Penny Arcade
Misfile
Jack
VGCats
Contemplating Reiko (So disturbing yet so funny)
2Kinds
Gone with the Blastwave
Antihero For Hire (made by the same guy who did Adventurers)
Dr. McNinja
Happiness and Cyanide
No Need for Bushido
Questionable Content

EDIT: these are the only regular/semiregularly updating ones.

Bah, I was going to take credit for Cyanide and Happiness.

Mac Hall is the only one I read not listed here. Oh, and Chicken Soup for the Soulless Hellbound. Edit: I swear it must have changed its name. That must be it.

Edit edit: Oh, and it has a talking mime. You people are all obsessed with ninjas/pirates/monkeys/robots, but mimes are the true boo-ya-wootness.

Edit #3: Oh, and it's technically not a webcomic (actually, it's not a webcomic in any sense) but it has a similar episodic nature that players of a text game can appreciate. Or whatever.
Girls Are Pretty

Edit #4: Oh, and note how I use "Oh" at the beginning of each interjection? This is because I write exactly what I hear in my head. And it always involves a happy bouncy feeling (the little me in my head jumps up and down shouting "Oh! Oh!")

Adventurers stopped -ages- ago.

...didn't it?

Also, no one seems to have mentioned Erfworld (same person/people as OOTS, I think, it's on the same site).

Other than that, CAD, 8bit, QC, Last Days of Foxhound (don't bother unless you played at least Metal Gear Solid and hopefully the rest too), Checkerboard Nightmare (no longer being worked on, but amusing anyway, and he's working on some other less interesting ones like Starslip Crisis), and a couple others.

gah, I forgot perry bible fellowship. Probably because there was a month or so without any updates at all...

Hosted by Giant in the Park as well, but different person makes it. I read Erfworld, and really enjoy it.

So:
Erfworld
Order of the Stick
Ctrl+Alt+Del
Penny Arcade
VG Cats

Those are the main ones, though I do tend to read Cyanide and Happiness every once in a while.

I've been developing a soft spot for Russel's Teapot

Some of my favourites:

Sequential Art

Spider and Scorpion -- THIS IS VERY WEIRD AND VERY RANDOM. Also by the author above.

Better Days - Super great comic... but it's gotten really boring lately.

How do you people not read Sinfest? :boggle:

Also Lowroad is amusing too.
And Errant Story is pretty good too.

I used to, but it got very repetitive after a while. Still not terrible though.

In no particular order:
Penny Arcade
OOTS
Goblins
The Noob
LFG
PVP
Erfworld
wulffmorgenthaler
Also, occasionally, R.K. Milholland's stuff (wish he'd get around to picking New Gold Dreams back up)

Five months. Call me old, 5 months and last Friday are pretty much the same to me.

(There was a Karn in Achaea, I enjoyed asking him if he'd seen Ardam and getting 'WTF ?' as an answer).

Looks like Freefall has stopped updating too, that was another one I liked.

Hmm...

2kinds
Terinu
The Noob
Gone with the Blastwave
Chugsworth
Dueling Analogs
All the Snafu comics
I used to read the Squirrelworks ones, but they don't get updated
Better Days
New World
Wereworld (Sometimes)

Sinfest
Dr. McNinja
Sam and Fuzzy
The Order of the Stick
VGCats (getting worse since the very beginning)
Erfworld (not getting worse)
xkcd
Perry Bible Fellowship
Dresden Codak
Applegeeks
Questionable Content
Chugsworth Academy (sometimes. like pr0n.)