Streamlined Crafting. To craft any item, I have to select the kind, the item, and then hit ok on a popup window. Using the mouse is funky in this game already, so I notice that I'm slowed down by selecting that "ok". Anything that made this a keyboard command only or just did away with the extra step would make crafting a little bit less irritating.
Bigger cross hairs. Maybe I'm blind, but I have a more difficult time aiming my arrows when I'm not sneaking because the cross-hairs are much smaller normally. The increase in size would help.
Purple dark brotherhood armor. I have a massive obsession with purple, and am happy when anything is made purple. I also love the dark brotherhood, and they are my favorite faction. Changing the tint of the armor and sticking it somewhere in the sanctuary? That would make me a very happy girl.
Purple hair, fine clothes, face paint, bows.... Yeah, while we're at it, I'll take any purple you throw at me. You have a fan right here! I'd love to see some fine clothes in purple, and an option to get my hair some ridiculous shade (art imitates life amiright?).
Storage. Someone out there is probably already on it, In fact, someone may have already done this, and I just haven't had time to check just yet. If not, storage would be nice. I'm really looking forward to the astounding and creative houses that this community will come up with, but I also understand that's long term. A few chests until then would be nice - the one house I own doesn't have enough for me to effectively sort my goodies. Would it be possible to have 0 weight chests sold by a few vendors, which could be dropped in the owned house?
Pillow fort and floating book staircase. Heh. Remember making these in Morrowind? I loved the book staircases. I'd stack them in tall spirals, and take out every other book so they were floating and awesome, and then cover them in gemstones. Because I'm five. I, like others, made ridiculous pillow piles and forts because we could. I know the physics engine won't allow it, but I'd love to see them exist static somewhere in the game. Maybe an invisible spiral bookshelf? A pillow fort that you can go inside, and there's a kid living it it? Let your imagination go wild!
Multiple ring slots. I too think it is silly that we can only wear one ring. An increase seems to be in order! ^.^