What's your biggest gripe with movies in general? I personally can't stand when a movie that takes place in an area/time when those people didn't speak English, but they speak English anyway in the movie. It just really takes the realism away for me. For example, I just saw the Pianist and although I thought it was an excellent movie, the fact that everyone in WW2 era Poland was speaking English was just a joke to me.
I know some people can't stand subtitles for some reason, but I would rather be watching a movie as if I was watching what was really happening then the other way around.