I used to be pretty hard core butcher paper only. Now, this is another thing I don't care as much about anymore. I like BP and Foil. Never used parchment. I like to go unwrapped too. Just depends on how full the moon is, and how heavy my beer is, and if the dog is scratchin' alot.
In all seriousness I like them all. I find a use for each one at different times. Heck, even the foil pans. I did a pulled brisket not to long ago that went in a pan after it had been on awhile. Sure,. it ended up braised. But that's what I was after... best damn tacos ever!