It depends if he likes it a lot. If he doesn't he is just giving you a very playful name. It can be good or bad depending if people like to humiliate you really bad with it. It can be adorable at times too.
Rabhy pronounced like American Robby!
depends on the nickname.. could be good or bad
If you're a boy, STOMPZ
If you like 'Nan' as a nickname, then yes, it is a good nickname.
K-boy
charlie
max, axe
andrew
horse boy or girl
ill say mega smasher.
..It depends on what their name is. Example) Jason: Jay.
(Boy)AquaArmor or AquaAngel(Girl)