You can paint them, stencil, sand and re-stain them, add glass or wire inserts, add trim mouldings, etc. You'll need to remove doors from hinges if you plan to work on them. The rear sections of the cabinets are usually attached to the walls with anchor screws that have been drilled into the wall studs. You should attach a French cleat to the wall to support the upper cabinets' weights if you plan to do this alone.
I will try painting them