Inspired by this thread, “Comics that just aren’t funny” – http://boards.straightdope.com/sdmb/showthread.php?p=7147067&posted=1#post7147067.
I think Foxtrot is excellent. Hagar the Horrible is often funny. So is Dilbert. Outland has its moments (but it is only a pale shadow of Bloom County).
Frazz
Get Fuzzy
Non Sequitur
Zits
9 Chickweed Lane
Rudy Park
Brewster Rockit: Space Guy!
I’ve always liked Pearls Before Swine. I also admit to liking “One Big Happy”, although I feel a little guilty for liking it.
Perry Bible Fellowship.
Dilbert. Fox Trot. Zits.
Wow…that’s pretty bad for four frickin’ pages of the paper, eh?
-Joe
agree with
Dilbert
Get Fuzzy
Pearls Before Swine
Tom the Dancing Bug
Gil Thorp (unintentional)
B.C.
Family Circus
Garfield
Oh, sorry, wrong thread 
Sheesh, so few? Here are the ones on the top tier of my funny meter, and I read a few others every day in addition:
Dilbert
Monty (the cartoon formerly known as Robotman)
Sherman’s Lagoon
Betty
Big Nate
Brevity
F Minus
Frazz
Fox Trot
Stone Soup
Zits
I don’t know, maybe I’m just very easily amused.
Heh, that’s pretty much exactly what I said in the comics-hating thread.
Likes: Get Fuzzy, Pearls Before Swine, Zits, (sometimes) Drabble, Wizard of Id, (occasionally) Mother Goose and Grimm. Of comix I used to like, B.C. has become painful, Dilbert and Shoe have increasingly descended into schtick, and Doonesbury, while it continues to be at least interesting, hasn’t done anything laugh-out-loud funny in years. The current storyline with B.D. and his Post-traumatic Stress disorder is earnest and worthy, but lord, is it ever tedious.
Pretty much everything else I hate, hate, hate.
It’s not in the papers, but check out Sinfest.
You might try User Friendly Although I suspect it has limited appeal (comp sci geeks primarily.)
User Friendly
Dilbert
Irregular Webcomic
Casey and Andy
Freefall
Get Fuzzy
Legostar Galactica
Something Positive
Queen of Wands
I recently got hooked on Pearls Before Swine.
And I’ll vote for the newcomer InkPen. Any comic willing to throw out obscure Jack Kirby references gets a vote from me. 
I read:
User Friendly
Dilbert
Foxtrot
the Yahoo Rerun’s of Bloom County
Get Fuzzy.
I also read GPF, but it isn’t a funny comic.
The Classics were:
Calvin & Hobbes
70’s Doonesbury
the Farside
Bloom County
Peanuts
Jim
That’s a good strip. Like the recent arc where Captain Victorious and Mr. Negato lost their powers.
Dilbert
Foxtrot
JumpStart
Arlo and Janis
Get Fuzzy
Frazz
Pearls before Swine
9 Chickweed Lane
Helen, Sweetheart of the Internet had some moments. The online edition at uComics seems to be stuck on 12/25/05.
Such little love for Sherman’s Lagoon, only mentioned once prior to this post. I think it’s a scream.
I mentioned these as funny in the other thread, but here they are again:
The Boondocks
Doonesbury
La Cucaracha
Non Sequitur
Zits