20+ years in now. Mostly corporate event cobblers, but a good smattering of theatre & rock'n'roll in there too.
As with all jobs it has it's ups & downs. I get to work in some VERY cool places, I get to go to some very cool one off gigs, for free(ish). I don't have to sit in an office 9-5 pushing paper around (it's usually more like 8-8!!). I get to play with big heavy lumps of metal and wierd cutting edge tech and see what it can't do. And I can call myself a designer and do an arty flounce when I want to. The bunch of guys I usually work with and rely on are some of my best mates.
The downsides? Average pay at best. Dangerous working conditions (much better then they used to be - it's now expected that you wear a harness when climbing a truss, rather than an attitude of "if you need one you shouldn't be up there" - and arguably WAY better than a building site), but still random electrical shocks, manual handling injuries, slips/trips/falls, work at height etc. Long, unpredictable hours (I was doing back to back 20 hour days last week, interspersed with 4 hours broken sleep on a tourbus, all in the name of promoting hair dye). If you're working outside, it'll be pissing it down and muddy. If you're inside, you'll go for several days without seeing daylight.
But I have absolutely no idea what else I could do that what be near as well suited to me....