Mine are natural wood. Drawer insides also. I think I'd be afraid of paint chipping on the inside as heavy pots, pans, trays, etc are hoisted in and out daily.

The only reason I can think of for painting the inside of a cabinet is if it has glass doors.

Natural. I wouldn't paint the inside unless I had glass doors.

I vote for a clear coat on natural wood for the interiors. No worries about things sticking to the paint, and it will look just fine. Our bathroom cabinets are that way.

Forgot to mention that the insides of my two uppers with glass doors are painted. You can see that in the pic posted above. Another point to consider is the extra cost of having the insides painted. Certainly not something I was willing to spring for.

Thanks! So natural on solid door cabs and white on glass front cabs. Makes sense! : )

Most of my cabs are finished with dark milk paint (more of a stain than a true paint) & the insides are done in a watered down wash of the same color. The same color is used on the inside of the regular white painted cabs, also. Since I did all of the finishing, the actual cost was negligible - but what a PITA! But what a pleasure to look at every time I open them.