To be obsessed with something is to fill one's mind with that thing constantly. Would it not be then, that by looking at the list of things on this page, you'd know what's on my mind most of the time?
 
Bread. Especially the multi-grain rolls in Morrison's.
Track 8 on the "Stars of Buena Vista" CD. Don't know the title.
Spain. Going there during the summer holidays!
I'd like to add - Tort, Constitutional and Contract law. But, erm.. I can't say I'm obsessed with it voluntarily. Ick.
Oh oh! How could I forget. Marks & Spencer's Teacakes! Those little bits of heaven! Chocolatey and marshmallowy!
 
If I can think of anything else to put here, I will. Soon. After my exams, that is.