Wouldn't display the more kinky stuff for the world to see; may be in a back closet somewhere, but am not ashamed of my hobbies and interests. I have my anime and manga books in my room on shelves and my plushies in a little basket that goes well with my decor. Cosplay outfits are sealed and folded under my bed or in hat boxes; posters are on the walls or placed sealed in my storage room and nerdy shirts are in the drawers and hanging up. Still need figurines though.
It's fun to invite new people to your place and when they see your into it they are either curious (have heard about it, but never read it before) or are fans as well.
The only issue I think I would ever have with this type of stuff is with my dad.... if he saw more of my ecchi and risque otaku stuff.... well....
You get the picture lol (^^;)>