I do, for as long as I can remember. It can be any kind of subject- true crime cases, a specific period in history, an iconic figure who has passed on. I will spend a few weeks where the topic in question will occupy the front of my mind when it is otherwise idle, and I will seek out information about it and learn as much as I can. And then one day, BOOM, interest gone and I move on to something else. Often times, this will all have occurred without me even mentioning the topic in question to another living soul.
I'm currently obsessed with Elliot Smith, I had heard his music in passing and knew vaguely of his death but never thought any more of it until a few weeks ago when I came across an article about his life, and I've been hooked ever since.
Do other people get like this, or am I an obsessive oddball? I'm very level headed in all other aspects of life, so always find it funny how invested I get in random things 