Achewood, Ozy and Millie, and xkcd. That's it.
I refuse to add any more to the routine because what I have seen of others hasn't been terribly impressive (none of them have been particularly bad, mostly just mediocre), and I don't want to ruin the "perfect zone" of the three webcomics I really like.
I've never been much into paper comics, although many of my friends are comic geeks. I am totally obsessed with Wonder Woman, however, and I do keep track of her storyline and her comic to a degree; I've just never bought a comic book in my life. The times I think, "Gee, with as much Wonder Woman geekitude as I possess, I should probably start buying the comic," I end up going to the comics store, thumbing through a couple of issuess, and feeling satisfied that I'm updated on what's going on in her life. I then walk out empty-handed. It gives me a feeling of unease, like I'm afraid all the other card-carrying Wonder Woman geeks out there will kick me out of the club for not buying the comic. But the occasional comic-store thumb-through is sufficient enough for me. S'weird.