Lately, I've not been playing much that's coherent, but I've been noodling around in bits of original instrumental rock/fusion type stuff. I've been listening to mostly classical, lately, especially Beethoven's piano concertos 4 and 5 (which may explain my piano hang-up), but haven't really done any heavy tinkering with classical involving my own playing, though I'd like to.
Originally, I got into 7 strings because I was really into the death metal and grindcore styles, and wanted it for the low-tuned aspect. I don't play nearly as much metal as I used to, but I still like it and try to work it in with what I do, though I'm more of a metalcore guy by now.
If you asked me what bands my music was similar to ( which I guess you did), I'd say a big one would be The Dillinger Escape Plan, just not heavy as consistently. Another big influence on me has been Meshuggah, and I like to try to use heavy polymetric riffing under relaxed leads or clean parts. However, I also really like bands like Estradasphere, and Allan Holdsworth is a favorite.
Don't let this lead you to believe that I have a great volume of completed work, however. I have lots and lots of bits and pieces, with which I am convinced I could assemble into pretty good songs, but have yet to sit down and arrange/add to. Hopefully, I'll be able to finish a couple this summer.