You should never.....

get mad at someone who doesn't send you a thank you note....Or innuendo to them that they haven't...or say "It is soooo nice to get a thank you from you" after they actually hand you one...
If you do, you need to ask yourself why are you giving them gifts...are you giving them something so they have to give you a thank you....that is a control issue...I actually saw this on Dr. Phil one time....

Don't get me wrong...it is important to say thank you....but when you give a gift you need to give freely and not have attachments to it...Also, I don't think you should remember everything you have given a person...and then recite all those things back to them....that is rude!!!!

It has happened to me!