I have noticed that a lot of question that are several days old still dont have a 'Most helpful answer' selected. And that some answers, even if the question asker responded positively to the answer, dont get an upvote.
So if you ask a question what do you do? Do you upvote and/or select MH? Why? Why not?
Personaly i think everyone shopuld try to select MH and give upvotes after all people did take the time to try help.