Working at dealership wouldn't interest me whatsoever. You take something that other people have developed, validated, and manufactured. Then you sit back and wait for the manufacturer to advertise it (I've seen many examples of local dealership marketing, pretty lame. Not even Toyota or Honda does it well. In the SE Michigan area we have some idiot named Rockin Rick who screams at you like someone possessed, very annoying). Then you do such a crappy job of selling it that GM has to put incentives on each car to try and give you an advantage over people who really can sell cars.
Then, just in case somebody stumbles into your dealership, you take their order. What's the fun in that?
Oh yea, sometimes you have to service a vehicle and rip of the customer and GM doing unnecessary warranty work. Or schedule him for an oil change then tell him you're too busy because there's no money in oil changes and there's no other warranty/recall work you can do...I've observed that one personally.