My mom was adopted, but she is certainly of western european descent. I'm GUESSING german.
Other than that, I'm very high % british in origin from what records we've been able to dig up about my dad's side of the family. In addition a number of ancesters came from Germany, Finland, and a few other European countries. As far as I can tell, I'm 100% european, at least for something like the last 500-600 years of ancestors.
I've got ancestors in the original Jamestown colony. Two ancesters were brothers fighting on opposite sides of the American Revolution. The one that is a direct greatgreat...great grandfather was a loyalist and fled to Canada with his family to avoid the war. The other brother was a general for the American forces, and even has his own Wikipedia page: http://en.wikipedia.org/wiki/Nicholas_Herkimer