Anthony, Most of those are related to number of posts and obviously it's mainly for fun since x amount of posts really doesn't make you an expert. It mainly serves to tell others that you've either been here a while or you are a really avid poster.. or both.
There are a couple that are not related to number of posts:
OTBS: This stands for Order of the Thin Blue Smoke and is a very elite group of smokers that everyone wants to belong to. The only way to become a member is to be nominated by your peers. If you are here a lot, really helpful, eager to learn, and you show great potential, there is a pretty good chance that you will eventually make your way into this group.
Premier Member: This is just a way to help support the site.. you can pay $15 per year and get this status added to your user name. For that status you get to remove all of the ads on the site and place off-site links in your signature area if you so desire.
I will have to do some research to find out exactly how many posts you must have to progress to each new level.. it 's been a while since we set those up.