Serial obsessions

Anyone else have a series of obsessions that seem to come and go in rotation? 

When I get into a hobby, I throw myself into it fully and pursue it with passion whilst I'm learning at a decent rate. Then when the learning slows down because of the plateau that inevitably comes, I lose interest and move on to something else, often an old hobby.

Because I value efficiency, I'll often sell all of the hobby equipment - sometimes regretting it shortly afterwards.

I've been through astronomy, photography, shortwave radio, ham radio, electronics, hifi, religion, piano playing, guitar playing, motorcycling, advanced motorcycling (to the point where I was qualified to teach this). On the odd occasion that I find myself without a passion I get into a hell of a mess with addictive behaviours too.