I love the ones we already have, paintings were the first items I placed in my bare stone-cold home, Mournoth Keep.
Now as the market is literally flooded with paintings and possibly a lot of us already have all kind possible to acquire (and one of each can easily be placed in a medium home) I'd be happy to see other themes too.
Yesterday a few crazy friends took a visit in my home and we had a blast laughing when they said "I have that loading screen too" - actually if only the loading screens could appear as paintings that'd be awesome.
There are many beautiful and artistic loading screens...

I'm just levelling a DK (thank you for the event double XP!) and love watching the main storyline loading screens: Sancre Tor, Valley of Blades, etc. - all wonderful and could imagine to have them on the wall somewhere.
A quiet desirable side effect of having a lot more painting theme could be that if I'd like to own them all it'd be a considerably bigger achievement to collect them and definitely I'd have to select what to put on the walls because all of them would not fit in lack of wall space (like it fits now one each easily and I just sell the newly found ones for less than a green recipe...)
Thank you for the great game anyway, ESO rocks!