When making kitchen cabinet doors out of plywood, what details will impact the final product?
Your main concern is the wood warping. I've used plywood for cabinet doors in the past and they have all warped to one degree or another.

Your best bet might be getting marine ply which is designed to withstand moisture and hence less liable to warping.

If you can get a thicker ply (7 or 9 ply perhaps) then this will also minimise the amount it will bend.