In Oblivion, there was an expansion called the Wizard's Tower that gave players a separate space to do their wizardy stuff.

For Skyrim, there are mannequins for displaying suits of armor, but there are not enough in one place to see all the outfits. In fact, there aren't enough combined to show off all the outfits.

I want the equivalent of a car showroom for the outfits. Maybe it's a walk-in closet. Maybe it's a "raiments" store of my own that I can stock with outfits I've collected.

I'm assuming your on a console platform.

This is something that bugs me too. I know many people aren't interested in this sort of thing. But I wish it was easier to set up our homes like in Oblivion. I enjoyed getting my trinkets and things set up on display in Oblivion.

PC users can get many mods for homes with many mannequins.. but still difficult to set up your trinkets.

I agree. It's even more limited then Oblivion... Skyrim is very limited overall it seems. Hope they fix this in the upcoming dlc's