I like it very much, my wife less so. The more often I get it, the less exciting it is, so I think that feeling of "forbidden" and "rare" is a part of the thrill. It feels great, but different. I'd say I get it three or four times a year.
But I disagree that it is better than vaginal sex. Vaginal sex is #1, oral #2, anal #3.
I've never tried armpits, and never had a woman with big enough breasts for a tit-fuck.
Basically, when I'm horny enough I'd stick it in any hole my equipment would fit into in a woman. But my dick, though small, is still too big for a nostril.