Yeah, me neither. It looks like a lot of hard work and black T-shirts. Sure, if you manage to climb the ranks up to, say, guitar technician (who are frequently better guitarists than the band members, only fatter), you do get to go onstage before the show starts. And the sound men get to say ‘check, check, check’ to twenty thousand people. Still, a roadie’s life is not for me.
It is, however, for some people, including the writer of this interesting article over at Kuro5hin. He crewed for, among others, New Kids on the Block:
So if sex, drugs, music, partying and hanging out with famous bands is why you want to be a roadie, your career has the life expectancy of a blind frog with two broken legs crawling across the LA Freeway during rush hour. If you don’t mind travel and a lot of hard work that everyone loves to hear you talk about, read on.
DarrenBarefoot.com 
For most of the 90’s I was a sound guy in various capacities, theatre, live audio, post for tv, etc…
did a small amount of touring with a folk band, a completely different universe than the stadium gigs that roll through town.
Nothing I have done since comes close to matching the feeling that comes from when the band is “on” and the crowd is with them and you’ve got the mix down as close to perfect as you can get.
Except maybe syncing a bunch of finely tuned sound effects and running the scene for the first time.