If you were to design a nickname what would you consider?

Nicknames can be quite attractive and cute. Or even beautiful. Then they can be strange and quirky. For the purposes of this question I’d like to find out if you know of any great nicknames. Ones you felt were quite lovely.

Also, if you were to design a nickname how would you go about it? Some examples: Perhaps your name is Julie you might add ‘anna’. However that is female specific. Anything goes in this question. I really need assistance with this so would appreciate as much feedback as possible.

Would you call someone by an attribute like Hope? Or a physical characteristic like Skinny, Slim (Shady). Made up nicks are also of interest if they are quite attractive. (For e.g. Boogaloo is not a very attractive or adult nickname).