I have made a number of mistakes buying motorhomes--no motorhome is perfect. Mistakes I have made: Too light a chassis--16" wheels on an Allegro 28 footer and kept blowing tires, despite being within weight ratings, proper inflation and increasing load range of tires.
Too much rear overhang--gives handling problems. Having a bathroom which was too small (did not have full head room for me @ 6'2" and not enough leg room. In fact the floor space of that motor home was too small with our 3 dogs. Purchase of a motorhome which was the first of a model series (Winnabego Adventurer Diesel built in 1991)--multiple problems.
I think that many folks are taken by the "glitz" of a model--and don't think about the way which they will use the unit. Also if you want to go to remote sites, slides, long length, and height can be a problem.
Bob and Marie Austin
Angel miniature poodle
2007 Holiday Rambler Ambassador 40 PDQ
Toad 2012 GM Yukon XL 4 x 4