Here's one that was a total deal-breaker for us: as Michiganders, we are pros at winterizing - I mean, winter is the time to go south, right?? Our previous Class C was easy-peasy to winterize - took maybe 10 minutes tops using a 3-way valve at the pump front which was accessed from an outside bay.
So as we started looking at small Class C or B+s, one of my first questions was "where is the pump - how does it winterize?" Aside from salespeople simply not knowing - many of the models we were considering required one to be a contortionist to even GET near the pump; or pieces of the interior paneling had to be removed. It was ridiculous. I'm assuming that 3/4ths of this country experiences sub-freezing temps at least once in a while - why on earth would they make a critical procedure so difficult??