I hate the word "reiterate." Unless you've said something THREE times, you aren't reiterating anything. "Iterate" means "to repeat." Therefore, "reiterate" means to "re-repeat." Dumbasses.
I'm an agnostic bordering on downright atheism, but it bothers me to hear people say "I swear to God." It just sounds harsh and crass. I had a teacher who would say it all the time last semester, and it just rubbed me the wrong way.