Sounds like a plan to me. I am very curious as to what makes people succesful.
But I doubt that many will share their most succesful niche and their work that made them succesful.
For me, as a newbie, this would be a gold mine if it takes off.
(the whole of MP social forum is a gold mine already, but stil...)
Let me start off though, for what it's worth.
Most successful niche: I have one account in Luxury and one in Nature/Travel and so far the Luxury is growing faster but Nature/Travel has the best engagement.
I am by no means more succesful than my competitors.
What I AM doing to be more succesful is read, read, read. And try out, make mistakes, and write down everything in encounter.