I've traced part of my family back to Ireland in the early 1700's. They ended up coming here before the US even existed.
The German/Austrian side left in the 1850s, I believe (apparently because he didn't like his stepmother! haha).
My greek side, which gives me my last name and most of my appearance it seems we don't know anything beyond when my great grandfather was born, since he never really talked about it, and died fairly young. But the island he came from was massacred by the Turks, so no records survived that. But I was told my great grandfather was quite adamant that our family were Americans, not Greeks. That's why my grandfather only knew how to swear in greek ;D
I do find genealogy very interesting, but at the same time to me it's rather trivial because what my ancestors did doesn't reflect on me. Or at least I don't think it does.