I've always loved cars, absolutely love driving them, especially on days when the weather is nice and I'm cruising around in a fast, good-looking car. I usually enjoy working on my cars, as long as I have the proper tools for the job. I enjoy washing my cars, detailing them, etc. Cars are my #1 hobby and I spend way too much money on them.
That being said, I don't think I'm obsessed. I talk about cars a lot with a few of my friends, but like a couple peeps said, there's a time and a place for it. I have other hobbies and shit to talk about and various things to do besides car stuff. And I won't work on cars for a living. I wanna keep it a hobby so I won't get sick of it.