Some wonderful descriptions of a post whore I found. Each describes OP perfectly.
1) A post whore is somebody who posts mostly meaningless messages consisting of one word or just emoticons. They have an unsaid ability to magically appear in any thread at any given time to add crucial arguements to the debate at hand. These said crucial arguements include ground-breaking conjectures such as "what," "oh," or a curiously little smilie who is blue, and yet neither happy nor sad
2) Someone who posts on an online forum just for the sake of posting. He or she doesn't have to have any relevant or complete thought to post. As long as the post count goes up, he or she is happy.
3) A type of trolling or board saboteur where the intent of the person is to invade the forum with an annoying presence
4) A person, who feels their higher post count gives them added credibility in the forum, even over people who have contributed for much longer and as such they go to great lengths to increase their post count.
5) A person who is starving for attention in real life and compensates for their shortcomings in society by living in a forum and inserting their presence across the board everyday and sometimes all day. As soon as their post count breaches the highest recorded for the forum, they often begin to post frequently on the direction the board should take. It is not uncommon to see their avatars change frequently often with a theme of power. Forum members will begin to try to put the member in check but to no avail as the person is feeding off of their imaginary power to which they compensate for their lack of real world activity. (Most notorious for fitting this definition is the member: Bluto from getbig dot com)
6) A post whore is someone who types thousands of messages on an online forum, mostly with little or no meaning. These people post at least 50 times a day, mostly consisting of one word posts or emoticons.
http://www.urbandictionary.com/define.ph...post+whore