My choice: Japanese voices, English subtitles

Ian

I don't know about your copy of Porco Rosso, but usually the original voices are superior

uberjay

Only because the dubbing is often terrible and too much effort is put into making it match up with the animated lip movement. Of course, if you're trying to multi-task, dubbing is really the only option.

jtu

Unless it's Disney dubbing. They do a good job.

zellia, crs, Alex, nelhage, trs, seph, lakmiseiru, ntn, susannah, jesse, quince, tibbetts, Richie, Lex