A few years ago we had a project to demo a house on the water, that was framed with structural steel. The steel had to be dismantled, repaired, primed, and reused on the same site.
Although this wasn't a true deconstruction project it required a little extra care.
I would definitley do a project like this again.
I always find that the owner/clients are the biggest variable. There's hard jobs and easy jobs. I would do all the hard jobs in the world for good clients/owners. I wouldn't want one easy job for a bad client/owner.