I am also a little late with the theme but I have a picture of my office at college, complete with friend:
And also my favourite shoes:
I was going to show you my bookcase but the photo I already have only has about five books on it and it's not very interesting, and my room is very cold today so I'm not venturing in there.
Guys, I would like to see your favourite thing. I'd prefer it if this didn't cross over with another category (for example not shoes, or books).
ETA: I just realised my first photo also works for the "rad things on walls" category. I will see if I can get a close up...
Ok it isn't great but it is a series of postcards with cats on them. They are very cute and I'll be taking them with me when I go to university (providing the cleaners haven't stolen them before I go).
ETA ETA: Paul those are both incredibly beautiful objects. I wish I still had a real piano at home, although playing the college's baby grand is a semi-compromise.