Hey Jeff, That was a pretty good analogy. I think you have a real talent for breaking things down in a unique way like that.
I myself had to make a simillar decision recently. I had worked on a small startup project pro-bono about 7 years ago with the hope that it may blossom one day. It came for me and I decided to leave my old job and haven't looked back, its been great.
The thing is that sometimes "someday" acutally may come and at that point you have to decide to shit or get of the pot, it sounds like you decided to take a shit. Congrats.