Yup, that's probably me. I often use spinning to do controlled intervals that I can't do on my rode bike. I sweat a lot too. But I don't fling my head around like some guys & spray the room .

If you don't like the music, tell the instructor!! When I'm putting music together, I try to get a mix of what everybody will like.

Finally, if I get really irritated in a class, chances are, I was irritated when I walked in. I just needed something to vent at!