To answer the post, I prefer non selective or a top mounted selector as it is away from the trigger. I never switch barrels.
Addressing the point raised by dick_dup 1: Compared to the other forum, I find this one a holiday. You want your head handed to you by the hierarchy, spend a little time there. If you're not in the club aleady, lurk only. If I get jumped here I don't mind. Even good guys have disagreements or their own agendas, from time to time, myself included.