Yes, same thing here. Recently I was trying to just remember what I used to like to do, and could only draw a blank. Then I had to clean out some boxes that have been sitting around for awhile, and it was like unearthing a time capsule of my old interests. Apparently, I once liked to read historical fiction (not enough focus to read fiction now), workout, and watch movies from the UK/ Ireland, among other things. Now...blah, nothing really. Although I have started listening to Nirvana and Metallica again. Dark, depressing, angry music. Good stuff.

Maybe you're just changing as you get older and time passes?