When I look at how much effort some users are putting into helping both me and myself, and giving quality answers time and time again, I can't help but wish there was a donate button or some greater way of rewarding these people then simply upvoting their answers.
I'm sure there are many more, but a great example of this is Arturo Magidin on math exchange. Time and time again I see incredibly detailed answers from him that answer the question very well.
Thoughts? Do these powerusers even want this option?