All kinds of different RV's and layouts but not the perfect one. We have not found one better than the one we have but we keep looking because at some point we will want something new.
We have a list and we start at the top and see how many things we can get. For us, number one is an outside kitchen, we cook outside and I do not want to take the time to set up a kitchen. Number 2 is the bathroom, do I fit, if not we move on. Many bathroom are too thin with a counter next to the toilet. Number 3, the bedroom, size etc., and the list goes on. After you get a number of things then other things do not matter as much but I can say 1 & 2 are required.