I prefer the japanese dub way more, mainly because of naruto raspy voice in the english dub. It fit really well when he was a child, but now he sounds like a child trying to sound like a adult but failing miserably.
english, because i speak english... and i prefer understanding whats being said, its more enjoyable to me when i can hear what is being said.
also, unlike every other english-speaking person in the english-speaking parts of the world... i LIKE the english voice actors who do a great job at what they do.
i find it funny that people go on and on about the voice actors sucking, yet those same people complaining couldnt do a half-decent job at voice acting even if their life depended on it.
I really respect English voice actors (or any other language, be it Japanese, or even French, <3 villain french voice overs from the good old days, so corny and 'evil' ) who really show their dedication to their art via their voice acting skill-z.
Personally, I think the war on dub is pure semantics. It's not only "americans" who want dubs, as a person whose first language is a bastardized (dialect) french derivative and who particular love the English language, I am as entertained listening to English dubs as I am listening to Japanese voice overs.
However, for Naruto, I will definitely use the japanese dub, because listening to them call out their jutsus feel more natural in japanese than in other languages. Unless it was something like "Magic Missile, Magic Missile, FLARE ... " :)