Downvotes can be demoralizing, no matter how many times you tell yourself the rewards are not yours until 7 days passes. They were never meant to be used in pissing matches but they are, so I tend to take the good with the bad and keep on going.
That's a hard stance to embrace when you're down to start with. Sometimes you need a stubborn streak to kick in and give the downvoter the silent finger and continue on posting.