It's not and all or nothing thing so the poll is bound to be a bit skewed.
I almost exclusively a semi-auto, from a Rohrbaugh R9s to a stainless Commander and a few things in between.
But, I also have a 642 that I carry occasionally depending upon how I'm dressed.
Whatever I carry, I don't carry a BUG nor do I even carry an extra mag.
I'm totally comfortable that any SD situation I get in would be within the 99.9999% statistic of being over within 3 rounds.
Now if I lived a bit closer to the Mexican border, I would probably change my carry philosophy to carrying no less than a 16-round semi-auto, and an AR-15 as my BUG.
Or is it the other way around?