I'm looking for input on host designs.

I'll be starting on some host designs in the next few weeks, so I figured I'd ask for some input from the community before starting.

Keep in mind this would be a prefabricated host and not a made to order custom host.

Here are the questions:

1. What button configurations do you prefer? (Side button, tailcap, slider, twist, trigger, keyed, lighted, etc.)
2. What power levels are you more likely to buy a host for?
3. What material preferences do you have? (Limited to copper, aluminum, steel, and brass)
4. What sorts of surface treatments would you want?
5. What battery configurations would you want to use in a custom build?
6. What form factors and sizes are your favorites?

Separately, how interested would you be in a more rectangular host instead of a circular one? Think more of a TV Remote shape instead of the typical tube shape.