Dude, I like MidKnight! I hereby dub thee "MidKnight". If it fits you, very cool.
My nickname is "Gruuve" (same as my forum name here)...I'm a musician and it has a strong musical connotation...I write/listen to/etc. music that has a great groove. And it's fun to spell it wrong.
I use this same nickname/username on a meetup.com site, along with the same avatar pic as I use here ("posterized", no face, shirtless body with my main bass guitar...women seem to think this is a hot pic). Although most dating material recommends showing your face, I think in my case hiding my face creates a little bit of mystery for the ladies. It seems very memorable...when I go to meetups and introduce myself (or put a nametag on if that particular group uses nametags), both men and women go "Oh, you're Gruuve!". Yes I am.
Gruuve