Newspaper:
Mutts
Pearls Before Swine
Funky Winkerbean (started around the time Lisa was sick again)
Crankshaft
Blondie
The Phantom (aka "Ghost-Who-Walks

)
Spiderman (Yay! No Quesada!)
Hi and Lois
Red and Rover
Sherman's Lagoon
Argyle Sweater
Rhymes With Orange
Prince Valiant
Foxtrot
...I can't remember the others.
Webcomics
Brawl in the Family (one of my first)
Gaia
Sandra and Woo (once I finally go through the archive)
Super Effective
2P START!
Rare Candy Treatment
Aikonia
Awkward Zombie
Another Videogame Webcomic
8-Bit Theater (again need to look through the archive)
Lightbringer