If you make 1,000 posts, you get a pair of Posty McPosterpants as a reward
Welcome and have fun!
Well, actually you become a Posty McPostington who is the person that wears the McPosterpants. It's all very complicated... and scary. You should see some of the pants. (I still see spots sometimes.) I'm sure some of them aren't legal.
You can change your avatar to a personal pic at 100 posts if the avatar choices chafe. Much like a pair of Posty McPosterpants. So choose wisely.