I feel the same after doing web programming for over a decade. I started out doing database stuff and actually with hindsight I think I could have quite happily narrowed my focus towards being a db specialist, and avoided that feeling of treading water. People say it's great to be an all rounder but it's only when you are focused you excel at one thing. After grappling with an ad-hoc task, I master it after a day, only to forget it by the next time I need to use it.