I have a similar fault (personality?) I find a new interest/hobby, and I'm gung-ho for 1/2/3 or so years. I read, study, get involved, spend a not-so small fortune on equipment/supplies, and get good enough at whatever it is at the time to be far better than the average bear but not as superb as others who have been passionate about current interest/hobby for a longer time and have stuck with it.
Then, my interest slowly starts to wane. The forums, the posts, magazines, etc, all (it seems to me) to start repeating what was discussed/advised/published in the past. Instead of studying/participating/purchasing, I start skimming posts/articles till my interest starts to fade slowly like a dying ember.
I then move onto something else, and repeat the cycle, ad infinitum/nauseum.
My interest before detailing was guitar playing, for instance. I have numerous guitars, amps, pedals, cords, digi this & that, mixers, mics, loads of looseleaf books I made about the craft, etc. I MUST HAVE the latest/greatest flavor of the month product. I attend seminars, shows, etc.
Before that was blues harmonica. Again, I accumulated harmonicas, lessons, blah blah. Before that...before that...before that....
I achieve skills/knowledge much greater than the hoi polloi, then my focus starts to.....slowly unravel.
I just finished putting together a looseleaf book re: detailing, and I'm hoping that's not the kiss of death for my detailing enthusiasm.
Just the way I am.