FWIW, I think a lot of us sit on the sidelines learning. I dont say a lot as I am only a 30hour student pilot, so I don't have a great deal to offer. Sometimes I pipe up saying how I am being taught something just to see if the is a better alternative. I also know there are other students watching too, because I have had several PM's from them helping me out (and hopefully me helping them) with confidence building..
I am sure my life skills may be valuable to a post one day. IF you want to know about sailing, motorcycles, electrical/electronics/computers then I am your man, but when it comes to flying, I will just sit and watch for now.