I started off as system admin, then the RAF bolstered my electronics experience so when I came out I moved to component level repair tech. Then migrated back to servers when I got compag certified.. Finally finished as a support tech with a few large and small companies eventually finishing my IT career as mentioned earlier as a 4th line/specialist troubleshooter..
I'd never want to go back into IT as these days I'd tell a customer exactly how everything is their fault
but I still enjoy IT as a hobby and keep up with my electronics.