READ GIRL GENIUS. I think you'll really appreciate it. http://www.girlgeniusonline.com/comic.php?date=20021104
And Gunnerkrigg Court. http://www.gunnerkrigg.com/archive_page.php?comicID=1
Both of these are excellent, and long enough to keep you occupied for quite some time!
If you want something else with a ridiculously long archive, I'd recommend
Archipelago. The art is really rough at the beginning, but keep reading because IT GETS SO GOOD. The world it's set in is incredibly detailed, and the plot is interesting once it kicks in properly. (around book 3 or 4, but the first two are really short and it's definitely worth it.)
The Meek is really excellent, if you don't mind the nudity and blood. (it's not porny, though.) Excellent art and characters, and every panel is so well thought out!
Lackadaisy Cats-- this was the first webcomic I started reading, before I really knew webcomics existed.
Outsider is really good too, but it updates very infrequently and isn't that long yet. (I don't know if you're into sci-fi at all...)
AND
RICE BOY. IT'S JUST... AMAZING. 8DDD
...I'll leave it at that for now! You have plenty to last a while.
(I'm kind of glad I don't read starfighter. It sounds horrible.)
....what Chirault-related thing? The minicomic? That's not... actually related to Chirault. xD;;;
(though the artist did tell me that you could easily pretend it was from Chirault, so...)
ALSO KERO I WILL BE COSPLAYING KIRAN YOU SHOULD JOIN MEEEE.