How good does it feel when someone says thank you?

I was just wondering everyones thoughts, on how far a simple thank you goes.

Does it make you feel good to get a thank you from the people entering your giveaways?

Does it make you feel good to get a thank you email from the winner of a giveaway?

I guess in my opinion the "thank you"'s from entrants, don't really spark that joy joy feeling inside. Although I suppose it hurts a little when no-one comments at all. However today I got a thank you email from a winner, and that just made my day.