We did not buy our Class C based on some primary way the two us and one small dog wanted to travel and camp. On the surface this approach seems to be a very practical and common sense one.
We instead bought our RV based on maximum flexibility so as to be able to use it in the widest possible variety of ways. It's a 24 foot widebody non-slide model: Being widebody, it is not too crowded even when we have to stay inside all day. Being short overall length, we can fit into small or large campsites and complete, or almost complete, U-turns on most residential streets. Not having slides we can use all of the facilities all of the time for quick stops, or during "emergencies" when the DW has to walk on a flat, smooth floor back to use the bathroom while I safely drive straight at a steady speed down a highway. Not having a slide provides stronger structural strength for our occasional rockhound exploring trips on often rough off-pavemet roads. Also, we just plain prefer to keep life as simple as possible - considering all the other mechanical and electrical stuff you have to be aware of and maintain with an RV.