Which do you prefer, Dragonball Z or Dragon Ball Super?
I liked all of Z but I do think that Toriyama should have stuck to having Buu Saga being a Gohan story all the way through. Also he should have ended the series when he planned instead of letting the publishers convince him to drag it out to get to 500 issues.
Super? Beerus and Whis are good additions to the cast. The growth given to Vegeta was actually something the series greatly needed since Goku is stuck in perpetual Idiot Monkey Boy mode. The rival universe designs during the tournament arc were mostly well made and some did succeed as joke characters.
Super's writing was basically a Greatest Hit package. Z was a genre-defining series that has been aped by everyone to varying degrees of success ever since.