When looking we had several lists, Must Have, would like, don't want, really don't want and dealbreaker.
Front door was on the "really don't want" on mine and "dealbreaker" on Jay's. Why?
Wife has a huge side window to look out of while driving.
Wife is up even with me while driving (some front door coaches offer this)
We were looking at older 1 or 2 slide units with slides on the street side so side door didn't affect slides. A curb side slide was on "really don't want" list for me, some of the FS/BLM places we camp are really narrow.
We're in and out of the coach a LOT when camping. Earlier this month I was dry camping north of Moab and I was watching my buddy with a 40' front door Patriot Thunder grilling dinner, his wife was in the coach handing stuff out the dinette window and taking things from him when done, I just take a step and pop in to get what I need while DW sits reading, really don't want to have to walk all the way around every time I go in or out for a soda or take puppies out at night.
We don't fulltime and I wanted a recliner so losing 30" of wall didn't matter, there's space for a shelf over the door and plenty of cabinet space.
We were lucky enough to find everything we wanted in one coach, it took some looking but we're very happy with it. If we ever upgrade it will be to another side door if possible.
Everyone has their own wants/needs, no wrong answer unless you settle for something that you don't want. Our reasons will seem silly to some and I'm sure someone will tell me so if past history is any clue, but they are our reasons, not theirs.