OK, popularity wise (at least in my generation/era (whatever) now)

Male- Blue Bull aka Packin Power - The hell! he's an instant popular guy in QL (Thanks to Mandi)

Female- Miss Teacher - cannot argue on this, not to mention how many missed calls she is receiving everyday :-P lol (kidding MT) ;)

Popular of All Time...

Male- There's a lot (you cannot pick one) Rizks, TB, Darude, Dracula,LP, Flor and Smoke (base on the number of posts i guess)

Female - Fathima, Miss Mimi, Nomerci, Snessy, Tinkerbell,Ghazals, Mandi and Alumnar (Great female debaters)