I'd say I'm primarily self-motivated. I want to do my best as much as possible.
The carrot side from the employer tends to be a couple things for me, a decent paycheck, if I'm doing good work raises, being able to do good things to advance the employers' goals.
Sticks tend to not work with me, as I will take responsibility for mistakes and errors, that's just the way I'm wired.
Now, de-motivators, the sort of things that drive me to look for a way out and not do my best work?
Not feeling like part of the team / having my suggestions completely ignored (being told there's no budget for something? I can deal, being told "we don't have time to do that" when you realize the DB that's going to be the back-end of the companies product is shite and fixing it later is going to be never? Yeah, total de-motivator.) / Having suggestions for improvements to processes etc poo-pooed...
Yeah, all of those will result in my reaching for the ripcord.