what game do you make things for?
I try to keep poly count as low as possible while still getting the best shape I can, mainly because FPS will drop fast with higher poly vehicles. Theres this thing called Flexbody which deforms the mesh when you crash. Thats where low poly really matters, since the game calculates all the vertice's as they deform. It feels great to make something that looks nice, and then drive it into a wall though
I think alot of guys here who make vehicles would love this game, it adds alot more to modeling than just making still renders. It's addicting.