Does anybody change their speaker placement with different types of music and bands?

As fate would have it most speakers are placed way too far apart and toed in way too much. The best strategy is start with four feet apart and slowly move the speakers farther apart, preferably using ye olde XLO speaker placement track so you can hear when the sound snaps into place instead of groping around like a blind man looking for his contact lens. Chances are rather good that, all things being equal, 5-6 feet apart with no toe in will be best in most situation. 🤗

Just listen thru a good headphone setup.

Once you develop awarness that it really is different for EVERY recording, you'll go mad obsessing about it.

Reality-you can't truly win. 

It's a good question. I have tweaked my speaker placement to get the best overall sound for different types of music and I'm not going to move them anytime soon. They are Salon 2's. So, I guess some of it may depend on the speakers you have (bookshelf or Wilson Wamm Master Chronosonic's). 

No

God no!