My take on it is if this is just about your den, well, it's your den. What you want in your den is your business. If someone wants you to change who you are or what you like to do, or how you like to decorate your own very personal space then that is controlling behaviour of the most basic kind. As someone else said, it is this now, do it and later it will be something else until you have lost who you are, what you like to do etc. the only way to fight this kind of manipulation is to expose it for what it is, challenge the right the controller feels to tell you who to be and what to like.
If this is an issue in the general areas of shared space around the house, then I think a compromise may be in order. A compromise something along the lines of you get to keep your stuff in the den or garage in your space and the woman(women) of your life get to choose dead-animal free decore, women are kind of funny about this for some reason. I'd like my axe collection above the mantle piece but the wife isn't keen for similar reasons! They tend to like pastel colours, flowers, lacey curtain and far too many scatter cushions. Almost never do women crave the heads of dead animals on their walls! If you find one be careful, maybe she is a man! No offence intended just in case there are women who like animals forcing themselves headfirst through the walls!
