Here is another reason to roleplay literately: You will win more often. Let's compare Bob and Fred, okay? Bob posts like this:
Bob
Bob punched Fred in the jaw.
Not a post worthy of any respect, no matter how you look at it. Save that it has no 1337, nor any errors. Fred, an intelligent RP'er, does not complain and instead retaliates.
Fred
Fred stumbled backwards slightly as the hit connected, but smirked and grabbed Bob's arm. The thing about close combat was that it was a lot easier to grab your opponent. Very deliberately, he pulled his leg up and kicked Bob in the chest, simultaneously letting go of his arm. The result was that Bob was sent flying into the jagged crystal wall.
You see, Fred worked harder, and therefore, Fred has earned the win. Make longer posts, and more of then, if you wish to be powerful.
Speaking as somebody who has been on GAIA for awhile, I can tell you from experience that you will have more fun.