English dub is good, but the non-main characters are extremely bland and annoying. Ed and All have really good actors though.
The Japanese with subtitles is what I watched and the expressions and voice acting is just top notch. Every character has a unique speech pattern and voice
But if you prefer English to Japanese then chose english
vic mignogna is one of the best dubbers of all time .. put that along side with Travis williamson and Troy baker .. its one of the best dubbed series ever.. if not THE best .. ( although my top one is Naruto .. but i dont feel like getting hate)