Interesting!! I would say the feeling of customizing and recreating a vehicle and making it different from others. Some would say the pieces and part of the car such as the engine, body, interior, exterior, and more. It is like watching Fast and Furious, living in a city were there is a lot of people into auto from regular fixing to those who meet week to show of their car and new finding that they are willing to share to other and etc. Overall, it is about the passion and loving of it, main thing is not worrying about getting down and dirty, don't forget their is like grease, oil, and etc. that you have to deal with that will get on your body, face, hand and etc. I chose automotive to be a hobby but not my career because I don't have the passion like other people.
Depends what you mean when you say automotive. I used to work for Toyota HQ in Project Planning. It's a big corporate environment and the work is challenging but satisfying. Hard work pays off when you see your project come to life.