I have currently had two stories which I am dying to write. One of which I now am writing (the follow up to Gold for Steel) and the other is a project I have had in my head for years. The plan is to finish the series I am working on now from beginning to end before I venture off into the dark waters of new worlds and adventures. With that said it's going to be hard. Every day I wake up and think of new plot points and twist for both stories.
The Gates of Kastriel is well plotted out, and I know exactly where the story ends. But Project B is different. Opposed to GoK where I don't think of it as separate books, just one big story I am just dividing up into pieces. Project B is a single book. One story that is told from beginning to end in one shot. Kastriel is something that will take me at least the next three to four years to finish if I can put out two books a year (fingers crossed).
I won't stray from the path, and I will keep working on GoK but, it is hard not to start a new word document and write about the Project B. When I do get around to writing that story I know it will blow people away.