I always" pick" the MHO. If non are very helpful, then i choose the one i believe is the most logical or the one i prefer out of all the responses. I pick one, because most people go out of their way to give genuine advice so they deserve rewarding for it.
I try to. Even i in this one question I did not select it, because none of the opinions were actually helpful. And no I wasn't being picky. Those opinions had nothing to do with the subject at hand! Lol