I've had the golf fever for a few years now. I just gotten over a major hurdle of changing my swing. It's the hardest thing to do. That is, most golfers will never get really good, because they have the wrong technique and they must change. The problem is, the proper technique is not at all intuitive.
This has taught me a valuable lesson. You have to check yourself from time to time because we are so overconfident of ourselves. If it feels right, then it must be. Well, here I am, playing golf in such a manner that feels goofy, except now the ball goes further and straighter with less effort. Imagine that.
At work, I extend this. If I'm working on a project, I try to spend as little time in between demonstrations to the end users. I can love the programs I write, and user-interfaces I design, but the problem is, somebody else wants it their way. YOu gotta do it their way, or it won't be used.