There are a couple of cases where the dubbed voice acting was better than the subbed, but with the horrific experiences of Americanization in shows like Digimon, i prefer subs. Dubs don't actually add anything good while subs can sometimes save me from some really awful animes since it creates a small feel of cultural distance. If it weren't for subtitles i probably would've jumped out of a fucking window while watching Zero no Tsukaima or High School of the Dead.