I have quite a few that I keep up with. There have been many that have already been noted [QC, MA3, Red String... etc]... but I didn't see these in your lists:
Sequential Art:
http://www.collectedcurios.com/sequentialart.php- Not really based in real life, but cute nonetheless. The art is amazing, too.
Real Life:
http://www.reallifecomics.com/- Follows the life [sorta] of Greg Dean, the creator. He loves video games, Star Trek, and has taken some liberties with reality in order to get some awesome story lines. Tony is my favorite character.

Blip:
http://blipcomic.com/index.php- The characters are interesting, and although I get confused once in a while, it really does have some good plots. Plus K, the main character, is totally relatable.

Eros, Inc.:
http://www.commonnamefilms.com/erosinc/- Follows the life of real life cupids. Cute, and the characters are pretty cool. Deals with some real relationship issues, and has zany wierdness to balance it out.
Goblins:
http://goblins.keenspot.com/- For anyone into roleplay gaming [D&D, for example], this is a comic about gaming... from the monster's point of view. The art is pretty good, and at points there are a few too many characters to keep track of, but the stories are awesome.
Wapsi Square:
http://wapsisquare.com/- The main character is an archaeologist with mega boobs, who somehow manages to collect quite a few supernatural friends while trying to save the world. I got hooked on it after just a few comics.
El Goonish Shive:
http://www.egscomics.com/- Supernatural beings, saving the world, and people changing genders? Yup, that and more. The characters face serious obstacles, and grow/mature really convincingly throughout the comic. I like that.

And thanks, now I have ten more comics to get hooked on.
