I have never come across an anime where I preferred the Dub to the Sub. It has gotten to the point where I just don't bother with dubs anymore. To be fair I also don't watch much anime anymore, but I can't see myself ever returning to those awful over the top English voice overs. Also, with subtitles and the original japanese voices you can learn japanese passively, and get a lot of listening practice. If you are trying to learn the language then I don't think it makes much sense NOT to use subtitles. As other people have said in this thread, before long you start to understand little packets of conversation that pop up all the time (and if they pop up all the time in anime, they probably pop up all th etime in real life).