In general I am an Idea Designer. This means that, for my games, the theme and flavor almost always come before the mechanics. For me the fun part is building the world and the story of what the player is doing. Then the mechanics part of the design is where I tend to slow down, and in most cases abandon the idea. I am hoping that by writing this down, it will remind me that this is a trend that I follow. Maybe having it exposed will help keep me focused on finishing the ideas I have started.
Here is a great page about game design in general, but directed towards Board Game Design.