I don't mind them, but I have to admit it really sucks when a character is speaking and the subs for the first part of what they are saying appear and you were able to finish reading that with ease because it was on longerr than needed so the second part of what they have to say is on screen for only about 1-2 seconds and then it disappears so that the subs respond to the next character. Or when the first character is still talking in Japanese but the subs disappeared ahead of then. Personally the worst I have ever seen, and I don't remember the anime so don't ask, was when I was watching an anime and 2 whole lines of dialog appeared on the screen but I couldn't read any of it in time. So I went back and had to go through the frames to find it. 3 FRAMES!!!!! Only 3 frrames worth of time to read two lines of dialog... wow...