Depends.
I have ADD, so I get obsessed, and then I move on.
Right now, my main obsession (and this one stays) is visiting Africa.
I also have an obsession for Rhino's, Primates, and any other big beautiful creature.
Oh, I'm also obsessed with Theme Parks.
"Do you know what pledge time is, Andrew"? said the PBS Executive.
"Yes", Lloyd Webber replied. "My 50th birthday special must be one program that gets done a lot."
"No", mused the man from PBS heedlessy. "Not so much. Our Stephen Sondheim Carnegie Hall concert. That's a big one."
Spoons, forks and knives seemed suddenly to suspend their motion in horror, all around the table.