The gundam wingendless waltz VHS that I bought off of ebay. It had an episode of 08th MS team after the film as well since it was likely from an anime sharing group from back in the day.
I was an oddball, as a kid I often jumped between different streaming sites and would watch one episode in it's original dub and the next would be in english. It just depended if the website was missing an episode or two. But I my first foray into completely watching anime with the japanese audio was either Upotte or Lucky Star.