The skins do give you the ability to have a graphic that would be otherwise difficult or impossible to paint, so there's that. Plus, they are removable, so no harm, no foul if you decide to nix it in the future.
I'd be looking at a rather simple black/white graphic for an inexpensive guitar. Maybe something with an optical illusion to it, just for visual interest. Wouldn't want to have to paint that, really.
Unfortunately, most of what these sites advertise remind me of the cheesy B.C. Rich "Body Art" guitars or pretty much any Dave Mustaine signature Dean, ha ha!