I still go back and replay Legacy of Goku 2 and Buu's fury every now and again.
These game's are probably one of the best Dragon Ball games made, and as a total a great RPG on GBA ahead of it's time. Open world exploration, so many unlockables, equipment, etc. I'd love to see a 3D remake, I know the company behind the games posted some mock up photos of a 3D version on their Facebook a year or so ago, but nothing came of it.
Wouldn't call it Zelda-like at all though, aside from being top down like Minish Cap, gameplay wise they weren't similar at all.
I loved the flying aspect, and having the whole Dragon Ball Earth/World being more or less being explorable.