Its different from writers block. I only encounter writers block on projects I'm still enthusiastic about. My usual bouts with writers block deal with figuring out what the best to get from the current place in my story, game, comic, etc. to the next place and simply not being able to figure it out.
No, concept fatigue is different...
The concept that I came up with, that popped into my head, that was inspired by sock puppets, whatever it is and however I came to find it, I will eventually grow tired of it. Usually I go quickly from being tired of the idea to simply hating the idea, the concept, or whatever work I have put into it.
Previously as a game developer the time to dwell on that was slight, as I had to get the product out or I would not have a way to feed my family. Now though, not being in a creative business, I am devoting free time to concepts. When I hit that stage of concept fatigue, with near certainty, the projects wither and die. There are a few that I have kept alive and kicking, but overall nothing seems to help.
How do you deal with concept fatigue? Is it just my brain telling me that the concept is not good enough?