1. Old school special effects artist - Who gets to make and blow up models. Building stuff on the computer can be fun and kind of therapeutic, but it's nothing compared to how much fun the old techniques were. Traditional model makers still have a place in Hollywood, but they're a dying breed. Real shame.
2. Teacher - I had an afternoon teaching a class at my old university last year and got a real buzz out of it. Not sure I'd want to teach uni students, but at least kids who are old enough to have decent conversations with.
3. Neurologist or psychologist - Something that benefits the mentally ill in some way, anyway; whether it's identifying the biological causes, or dealing with the emotional consequences.
4. Archaeologist - I don't care if it means hours kneeling down uncomfortably in a blustery field in the middle of no where, I love the connection with what's gone before that archaeology affords. It's kind of romantic, picking up an object and imagining the person it would have once been so familiar to. Wondering what their life was like and what became of them.
5. Astronaut - Duh. You get make a distinct contribution to the development of your species, and have an amazing time in the process!
6. Movie director - Not too bothered about the fame and money, but I'd love to be one of those directors who's been so successful that they can come up with a story while sitting on the loo, and a studio will just throw a bunch of cash at them to put it on screen, with total creative control.