Eight years — basically you're a doctor of the forums.
Congratulations! Big step.
It's been 7 years since you signed up!
Today is your six year anniversary!
You've been here for five years now.
Today is your four year anniversary on the site!
You've been here for three years, thanks for sticking around!
You're now a trusted user and can create threads! Congratulations.
Today is your two year anniversary here.
This is your one year anniversary. Thanks for hanging around.
You've received 5 likes -- guess you're doing something right.
Hey, Happy Birthday!
You've chosen wisely.
Thank you for becoming a supporter!
Put a filter on it.
You associated your account with Twitter. Um, @awesome!
You associated your account with Facebook. Well played.
You've made your first post! Welcome!