Agreed, completely, this was Vegeta's true emotional maturity time, when he became a truly rounded individual and not just the arrogant prince (he's still that, but he's more than that, too). That alone makes it so much better than the entirety of GT. Hercule becoming Buu's best friend, and them raising a little dog together was great, too, showed a new side of Hercule that was much needed. GT has moments, but...a lot of it is...
...bbbbbaaaaaaaaaaaaddddddddd...