I'll do my best to provide an easy answer. I like power. Power is cool. It boosts your ego and lets you do neat things to benefit others if you so choose. It's a delicate balance between productivity and corruption, but I like living on the edge, so there you go.
Challenges make things interesting.
I'm also too stubborn to know when to quit. I have the time to dedicate to the job. You see, I'm not to the point yet where I need to worry about Suff, IQP, MQP, or getting all my graduation requirements in. This means I have time to sit and work on planning the budget, managing funds, etc. You can be assured that what work I do will be quality stuff.