If I try to remember which companies produce the comics I read, I'll probably get everything mixed up anyhow, so I won't bother. But I CAN name the comics themselves.
I read Transformers comics occasionally; I followed the WINDBLADE series faithfully until it started getting mixed up with crossovers and I got too confused to go on. It was beautiful while it lasted, though; I highly recommend it. ^^
Apart from that, I usually just read whatever catches my eye. I've been looking at a Harley & Ivy comic, Supergirl, Invader Zim, and a handful of smaller original series that got picked up by the big publishers...I was following Jem and the Holograms for a while, too, until the story started getting...strange. I was in it for the realistic character development, not wacky side-trips into other dimensions...
Anyway, if I had to pick the series I liked the most, it's the recent Darth Vader comic by Soule/Camuncoli. SO, SO, SO GOOD! People underestimated it just because Disney had a hand in it, but I loved every second of it, and if you really like Vader or are even mildly interested in him, you'll probably love it, too. ^^ I'm sad that it's over, but it finished strong, and I'm grateful for that.