I think I'd pretty much do what I do now, except I'm finding that I have less enthusiasm for crawling through dirty attics full of fiberglass insulation.
As regulars will know, that's only part of my work anyway, so as time goes on I'll probably cut right back on that side of things to spend more time on my other electronics work.
I'm a great fan of old records, old movies, and old TV shows, so some sort of job in film, record, and tape archives would certainly be something I'd be very interested in doing.
I'm working on my time machine out back right now.....