All of my online aliases for forums consist of my real name.. if possible.
My first attempt is my actual name, Jason, then proceeds 'JStrese' (a combination of the first letter of my first name, and my last name), then finally 'JasonDS' (my middle, last initial proceeded by my first name).
For games I generally use a random name.. like Zazzle, Nefarion, Limbstealer.. anything that comes to mind and fits the game
I've never used number in my names.. I dislike it (IE: samurai317, imalittleprincess69)