I always die a little bit inside when people say "grandma goku" when talking about the original dub.
The japanese voices are legendary and perfect. They are supposed to often sound insanely over the top and exaggerated, and not like a usual TV show or movie with real actors.
I never have a grandma in my mind when I see and hear original Goku.
I grew up with the German dub back then, and while many of them did great and hard work in general, many voices just do not fit for some characters and they never reach the insanity and intensity of the original. The same goes for the english dubs from what I have seen in the past years. Many characters feel and act completely different from the original dub. Not to mention the hundreds of changed voice lines. I think it's incredibly hard to dub most of the battle shounen animes into other languages. It works much better with more "normal" and grounded animes where they don't have to scream out their intestines in an otherworldly manner, lol. It's always an interesting, entertaining and often crazy discussion when talking about the Dragon Ball dubs.