I'm about to pull the trigger on a custom bike, but my reason is that I don't fit a standard frame very well. I'm tired of riding a frame with the shortest stem I can find, a stem riser, set-back bars, and my seat way up, and still being a little off. (Long legs / short torso) It's the best compromise I can do with a production bike, but it's funky. And I use it for centuries and brevets. As long as I'm getting one made, I'm also going to get it made all pretty-like. I'm nervous... and excited.