I think I'm generally a stick-in-the-mud: change, after all, is bad! :)

I can think of places where I think of myself as being innovative, but I'm not sure about ground-breaking: as dbang said, that implies to me that my choice will turn out to be important for other people, and I'm not sure I have the perspective to tell. Most of the places where I feel sure that I'm doing something important are also places where other people are doing it (that's part of how I know it's important), which makes it easier, I think, to tell what you're doing in cases of being an early adopter.