A couple of years ago, I'd side with Anna. Today, I'm more inclined to agree with you. As I learned the hard way, intrinsic motivation is extremely important for me.

(Long story short: I have a more than decent disposable income, which I earned by following my "little quirky interests". I could use this income for direct regular donations, but instead I decided to invest it, along with my time, in a potentially money-making project I had little intrinsic motivation for. I'm still evaluating the results, but so far it's likely that I'll make intrinsic motivation mandatory for all my future endeavors.)