Hi dof,
In terms of qualifying for the freeroll, the term "quality post" has slightly changed its meaning compared to say 5 months ago. We used a point system inorder to judge who would enter the freeroll. At that time, members started posting one liner or 2 liner posts to gain points, but the posts themselves added no value to the ongoing thread. So, we defined a "quality post" as being a post that is atleast 3-4 lines and clearly displayed a thought. Nowadays, we don't use the point system, but a "quality post" has somewhat the same meaning but is more flexible.
As long as you are enjoying the discussions and taking part in them, your posts will automatically be quality. And judging from what you said, it seems like you are having fun.
BTW how come you didn't play in the freeroll?