Yes, to post in ptp forums you need apart from being creative, know what you are talking about, on the other hand you must be coherent writing, In my case, before entering this type of forums had little experience writing, and less in English which is not my mother tongue, although I defend myself in it, I think the fact that I am passionate about reading, It has helped me in this.I also search for many new ideas when it comes to searching for many different things related to the topic. The fact remains that I think that posting on forums needs you to be creative. Since I am a writer, I try my best to be creative as much as I can. This is not that easy to do. However, if you try a lot, then you can come up with new ideas.