[Heat Magnet]

I think an enthusiast in general, whether for cars or other stuff like games, is someone who is pretty much immersed in the culture. For example, if you say something like "I like the Camaro" but can't give any worthwhile reasons on why you like it (aside from how it looks), then you're not an enthusiast. If you make the same statement but can sound like.you're giving an in-depth review, then you're on your way to becoming an enthusiast along with doing things like working on your car, becoming part of a car club/community, doing track days, etc.