ok....now you've opened the can of *&^%$ with the 'what are YOUR pet peeves' issues...mine:
--something in my trailer will eventually fail...i'm not happy about this, and wish the manufacturers would ensure no failures, ever...they WOULD, if only they cared about customers...but they're greedy....which, to me, is wrong, even though they're in business to make a profit
--it's not as big and comfortable as my house...they should make one that IS as big and comfortable as my house...that would be road legal...and light enough to pull behind the truck I've already got
--the entry has steps....it's not as if I belong in a trailer park
--ours doesn't have a garage...and even the toy haulers (except the semi-truck type) don't have a garage big enough to fit my truck and my motorcycles into
--Because of the limited kitchen counter space, I can't have a coffee maker and a popcorn popper and a toaster oven and a toaster and an electric can opener all out at the same time
--it only has two kitchen drawers....which means, as horrifying as this sounds, we have to mix up the 'big' utensils (grilling utensils) with charcoal lights, and spare batteries, and flashlights, and other misc. 'stuff', all in one drawer instead of having separate drawers for everything
I could go on and on...but you get the idea