Cabinet doors in part reduce the amount of dust that winds up on the contents of the cabinets, as well as other aerosol particulates like grease from cooking. Think about what the top of your range hood looks like if you don't clean it regularly.
Of course that isn't a factor if you have a low dust environment and never cook in your kitchen
Things that grind my gears but I don't comment on them because I don't want to be viewed as a pedantic twat:
Anywho Lose/loose It's/its
Driving behaviors:
Breaking small rules like changing lanes on a solid line Tailgating Not going on a green Blocking the box
Common courtesy:
Is a smile and a thank you too much to ask?
Miscellaneous:
Lists Irony Misplaced humor Niche references Very small rocks Bits of lead Churches