The interesting thing about going from a crippling fear of heights to being fifty feet in the air on a scissor lift every day is the platform itself.
I still have problems with the "OSHA" step on a ladder, and all that jazz.
At this point, when I'm on a lift, it doesn't phase me at all anymore.
It's probably because I have a platform and railings; but, don't get me wrong, it's not as stable when you're up there than it appears to be when you're watching someone else do it.
But, yeah, I'm over it.
I used to be absolutely terrified to go up fifty feet to adjust a light. Now, it doesn't bother me at all.