One thing about relationships is still somewhat complicated. I am not sure, how much I should demand things to be the way I want them and how much I should be open to trying to do things how my partner wants them.
So for example if your boyfriend were into metal, you would probably go with him to a concert to try it out. (Even if in the case of metal, you would quickly realize that different types of screaming are something that you do not even want to begin being able to distinguish). Then again if your boyfriend wanted you to try having sex with a five year old kid, you would (probably) not be willing to do that.
So what about the things in between? Day to day habits can become a crucial issue where you are not willing to compromise and then there are issues that can go deep and you are not certain how far you are willing to go for your significant other. Why is it more clear with small stuff? Is it because with bigger stuff it becomes a dangerous territory filled with landmines like rejecting something he cares about might feel like you are rejecting him (to him or to you)? Or maybe abandoning who you are for someone else may never be a good idea? Then again in a good relationship you should be willing to compromise and even in some cases try their way, right?