I would agree if going with wood cabinets that a inset style will have more issues with humidity than overlay ones do , if these are to be painted then go MDF to avoid the problem, IMO full overlays are just easier to clean and look great.

you get a bit more depth with full overlay... the door is on the outside of the box instead of taking up room within the box.

we considered inset, but as we wanted painted i decided against. i didnt want the look of 'paint rub' that you'd get in the tightest spots. on the flip side, a 'gap' is less noticeable with a darker wood door than with white paint.

in the end i felt that inset would just be a tad precious for my taste, but i also dislike apron front sinks, even tho i live in a historic home.

i think partial overlay has gone out of fashion. basically its like full overlay except the doors are smaller in both height and width and the front of the cabinet box shows, instead of being completely covered with the doors.