Certainly no illegalities, (remember the safety pilot role?) though maybe if you rent from a club, they might have rules that apply.
I really think that it's great that you'd want to try something new, but I think you're worrying about it a little more than is really necessary. You'll find it's a simple transition to make - just like driving in France really.
I'd be more concerned about two pilots in an a/c knowing exactly who's PIC at all times than what the landing picture looked like.
Flying is supposed to be fun, so go and enjoy yourself.
Oh and you might consider avoiding a Bonanza with a throwover yoke for a while