Not really, it's not like you get xp for them or anything. As much as I'm ashamed to admit it, I do get a slight thrill if I have over 3 upvotes but if it's just one I couldn't care less.
Also I'll admit that sometimes I will give upvotes to everyone who posted but my reason is that I'm too lazy to actually post a comment on their opinions so by up voting them I'm basically telling them "hey I read and appreciate your opinion, here's an upvote" 😊
If somebody answers a question of mine with an honest opinion, they have taken the time to think about it and type it in. So it certainly does not hurt me to take the fraction of a second to click on the up vote. And I try to comment on every opinion given my questions.
In general, I will up vote any opinion on any questions if it is a really good opinion, If it is mediocre or even poor I usually just pass on it. If it lousy,, or rude and offensive (to anyone), then they get a down vote.