There are quite a lot of comics that I have in my "webcomics" Firefox tab that almost never make me laugh. I just enjoy the story. I guess I approach them more from a graphic novel approach, rather than having a "funny pages" mentality.
Penny Arcade - Well, actually I laugh at that one quite a lot.
Overcompensating - I love Jeffrey Rowland. He's hilarious.
Scary Go Round - I started reading The Englishman's work back in his Bobbins days and never really stopped.
Diesel Sweeties - I don't recall laughing out loud, but I still like it.
Perry Bible Fellowship - He did a
comic about triage that made me nearly pee myself laughing. I forwarded it to all my medic friends. Since then I haven't found the same level of hilarity, but I love the artwork and craftsmanship that goes into each one.
xkcd - I love this one. I laugh maniacally at
most almost every single one of the strips. Pure genius.
Questionable Content - I really like his character development and artwork. I don't laugh much but I still like it.
Little Gamers - Most of the time he goes for gross-out humor similar to Penny Arcade, but it's still funny sometimes. I feel left out when he does strips in teh Swedish language though.
Natalie Dee - I love her so much. I know that some of y'all don't like her and don't get the humor, but I love it. They're just cute little one-liner drawings, and there's almost no character development or storyline to speak of, but I enjoy them.
Toothpaste for Dinner - same as ND. They're married, you know. I don't like Married To The Sea as much but I do read it occasionally. I would like to get a "
It's Mother fuck*ng Booze Time" shirt.