For those who want to know, here's the titles you are given for a certain number of posts:
Newbie: 0-9
Member: 10-49
Advanced Member: 50-99
GbaTemp Fan: 100-499
GbaTemp Advance Fan: 500-999
GbaTemp Maniac: 1000-1499
GbaTemp Advance Maniac: 1500+
As the others said, you can start customizing it once you get at least 500 posts. Just make sure not to spam just to get as many posts as you can which is the last thing we'd want around here.