I used to fly the way you described, E/R on the right and flaps/ailerons on the left. I call it left handed mode 1.

Then I got a computer radio and all of the pre-programmed mixing functions required that the ailerons be connected to the right stick channel. Switching back and forth between modes is no big deal, after a few hours (simulator?) you will be able to do both.

Being able to fly other people's planes is the greatest benefit. The super duper computer radios will allow you to have any combination of stick/surface link.

Another benefit is that if you ever need to land a jetliner in an emergency, being used to having the roll/pitch control on a single stick will make the job easier. Just don't make forward stick as up elevator (as most beginners tend to think and I have seen) or you will never get your reflex responses sorted out.