I sometimes make choices that are different than most of the people I know. It is hard to know while I'm making them whether they are ground-breaking (that is, in the future, more people will make the choice I'm making) or simply weird (my choice will continue to be unusual with respect to my peers). I think whether a choice qualifies as ground-breaking is only clear in retrospect.

Also, calling it ground-breaking to me implies that my choice actually affected other people's subsequent choices. If I do something that hardly anyone else ever does, and then more people start doing it but their choice to do so was not influenced by me, am I a ground-breaker?

I was a very, very early adopter of nipple piercing, the Java programming language, Reebok sneakers and web browsing. I have no idea whether to call my choices ground-breaking or not. It sounds awfully pompous! But no one else I knew was doing those things, and they all later became nearly ubiquitous.

I would say that I'm more often a stick-in-the-mud. That's always easy to see, because it doesn't require foresight! :-)