I looked at the Red Board once upon a time, long long before I "joined" into any board at all. By that, I mean becoming an active participant. For some reason, I can't speak to ever feeling the desire to join the red board.
Later, I joined the "green board" where I was active for about six months, maybe five. I was banned because the "owner" of the board took offense at any criticism of various vendors or flight schools, some of which were advertisers on his board. Personally, I offered to help out a couple folks with super cheap prices on handheld radios when it came up in a thread. I had no intention trying to compete with anyone. I was already selling them on eBay at that time at pretty much break even. For that, the owner banned me. It went well beyond that given the vile put forth by this person while attempting to communicate via a telephone call. I don't miss that board. Many from that board are over here. Some left entirely and haven't been active on any board that I'm aware of. I'm not attempting to bash the board, just how a certain matter was handled by its owner.
Several months went by and I "joined" this board. I had registered some five months prior but had never posted until I spent a very boring Thanksgiving weekend, one year ago. I've enjoyed the time here. It was a rocky start with some personality conflicts. I won't mention the name. Many will already know. Hoping I don't sound condescending, I've seen some mature growth in that person and I've learned some things from their posts. Heck, I've seen some growth within myself, to my own surprise.
I'm sure I've ticked off some others who will never respond to me. For whatever reason they may have, that's ok. I've been at odds with a few and then gone to the other end of the spectrum of very friendly chat. But, if I got along with every single person on this board at every moment I have no doubt the FAA would be looking for possible substance use during my next exam.
I visited the Purple board but I don't really have much of an opinion at this time. I didn't think it had as much aviation material as this board. That's neither good nor bad. It's just not for me. I say that knowing dang few of my 6,000 plus posts on this board are not directly related to aviation. But then, I'll gladly admit I'm every bit as much a rookie aviator as the kid who has yet to take his discovery ride. I may have achieved tickets and time but an incredible wealth of knowledge awaits me.
While attempting to achieve ever increasing levels of knowledge, I read and I learn. Sometimes, I comment. Sometimes, I ask questions. Working to become a CFI takes a lot of time on top of trying to carry out other obligations in my life. For that reason, I simply don't have time to explore other boards. So, I'll stay here and learn... until I'm banned.
Meanwhile, I'll continue my goal... to be the next Ron Levy.
(Without the history of abusing two-inch thick steel surfaces, of course.) 
