Any compliment scores very highly in my book, due to my horridly low self-esteem. One of the best, though, was on the massive party after graduation, which got written in my student cap. "Shine with pride over a loyal friend!". I've always been rather awkward in social situations, so getting told that i had a loyal friend meant a whole lot to me. I already did consider everyone in that class as friends, but getting it told directly made me feel all warm and fuzzy inside.