Welcome to the catch-all webcomics discussion thread! This is where you talk about webcomics you like, or ones you dislike, and so on! If a comic has a separate thread dedicated to it elsewhere in the forum, it's probably better if discussion pertaining only to that comic is done there, and not here.
Below is a big list of recommended comics compiled from previous iterations of this thread.
Dinosaur Comics -Talking dinosaurs describing a variety of interesting comics but never changing the panels! It's quite popular! And there are plenty of them!
Penny Arcade -The two gamer guys comic! The Gangbunch fora, predecessor to the MSPA Forums had its origins on their forums! It's near and dear to many here!
http://www.meekcomic.com/ (1st chapter NSFW)
http://www.octopuspie.com/ (Possibly NSFW)
http://achewood.com/ (occasionally NSFW)
http://thaumic.net/ (Occasionally NSFW)
http://www.templaraz.com/ (Occasionally NSFW)
http://invisiblehairsuit.com/ (Occasionally NSFW)
No longer updating, but still good