Off course he doesn't need to be metal. i's just that my ex wouldn't let me listen to my music and was always taking my cd's out of stereo to never be seen again, deleting music I had saved in the laptop and leaving my headphones on the floor on purpose so the dogs would eat them. I could only listen to music when he was away (he was unemployed) and every gig I wanted to go to that didn't include him (all metal gigs) would result in war and him not speaking to me for weeks before and after the gig. My band shirts would go 'missing' or he would 'borrow' them to go painting. And when he was drunk my music and appearance was a reason to pick a fight. When I finally got rid of him I promised myself to never let a man try to change me or come between me and my music again. I have actually been avoiding men all together and have refused dates etc for nearly a year (since we split). I know this guy is not my ex and I'm not really comparing them, I'm just terrified to end up with someone who hates my music and won't let me play it. I guess that is one of the main reasons I'm happy he is abroad. It all kinda caught me off guard tbh.
Honestly I don't think it was your choice in music but the mere fact that he was an abusive a-hole who knew how to "get" to you through those things. It's good to hear that you got away from that situation. I completely understand your apprehensions of feeling vulnerable with opening yourself up to someone else due to not trusting your judgement (in men) or their sincerity but don't change who you are or worry about how high your standards are cause the right person will come along and want to be with you for who you are and everything that comes along with being with you.