Necks and Bodies
I think a couple of cool woods would be full flame or quilt maple without any mahogany or backing of any kind. *I have a couple of guitars like this and they really sing. *I really like the sound of an ash or swamp ash body as well, and I have a buddy with a non-Ibanez guitar with an ash body. *He put Evolutions in it (the pickups are direct-mount to the wood) and I've never heard anything quite like it. *It's got a ton of low end. *Just my opinion, though. *
As far as the 6 or 7 string thing goes, I agree with pretty much everyone else. *Both are a necessity, and anything with an a.a.n.j. is comfortable with me. *I think most people here agree with that.*
Inlays? *Totally custom, man!! *I want abalone inlays of a fist with the middle finger up! *Ha! *Right! *I'm sure that's never been thought of before.
Final point: *Damn good idea asking the people who hang on this website. *I think it makes a ton of sense asking people what they want before you try to produce it. *I tip my hat to ya, and best of luck. *If you set up a website, let us all know a.s.a.p.