Since returning to the Living World in the Buu arc, Goku has recemented himself as the hero and doesn't seem to be going anywhere anytime soon. But the question is, if Goku were to die again, what would be his in-character decision? Would he still want to stay dead or would he be okay with being wished back with Dragon Balls?
If we take his main reasoning listed first at face value, Bulma has only been vindicated further. In the Super era, Goku's presence has indeed drawn more powerful enemies out of the woodwork and he's often made precarious situations worse. Beerus and Whis come to Earth (and Kaio's world) in search of the Super Saiyan God, though Vegeta was also treated as a suspect in this case. Freeza returns to Earth to exact revenge on Goku, training to become stronger than a Super Saiyan God in order to match him. Goku inspires Zamasu to begin his ningen-killing spree and to steal his body. Goku inspires Zeno to hold the Tournament of Power, putting whole universes at risk of erasure. Freeza once again puts everyone in danger by bringing along Broly for a day trip to meet Goku and Vegeta, knowingly unleashing the mutant Saiyan's uncontrollable power on Earth.
On the flipside of the coin, however, Goku usually saves the day and makes amends. He manages to become a Super Saiyan God, thereby satisfying Beerus and ensuring that the Dragon Team have a pair of mighty godlike beings as permanent allies. He manages to send Freeza back to Hell (though not before making a critical error in underestimating Freeza yet again). His eagerness to fight the multiverse's strongest mortals ultimately proves beneficial as it turns out that Zeno planned on cutting down on universes anyway, so the Tournament of Power gave them all a fighting chance to survive. Gogeta resoundingly defeats Broly and Goku's kindness once again creates another powerful ally.
The only situation I can think of that Goku didn't really improve in any way was the Goku Black conflict. He was basically a liability throughout that arc. So is Goku's presence ultimately a net positive?
If we go back through the less-canon entries in the franchise, a frankly stupid number of powerful alien and demonic foes arrive on Earth, most with little motivation to speak of beyond looking for a good fight or for revenge against the Saiyans. Accounting for movies, games and OVAs, here's a probably incomplete list of the ones who arrive in the week leading up to the Cell Games alone:
- Broly and Paragus
- Dr. Lychee and Hatchiyack
- Majin Ozotto
Next, let's consider Goku's time in the afterlife. By all accounts, Goku had a productive stay as he shot up to Super Saiyan 3 and learned of the Fusion technique (though didn't master it). However, at least by the Buu arc, Goku had already surpassed everyone he could find. He explains that he couldn't master Fusion because nobody in Other World was at his level. In the anime, only Paikuhan comes close to being a worthy match for Goku in raw power. It seems that the fruits of training in the afterlife have dried up, and Goku has learned everything he can there. The living world, on the other hand, has proven to still have a great deal to offer Goku. Beerus, Hit, Jiren, Zamasu, Moro, Broly, Granola... The universe of Dragon Ball is always expanding so there's no productivity in staying dead and hanging out with a bunch of old fossils. Goku seems more than happy to stay alive now.
The only thing left is if Goku finds another successor. Uub is always on the cards. Either that, or Goku surpasses everyone again and becomes depressed. If Dragon Ball Online is to be believed, Goku and Vegeta eventually agree to a mutual suicide by going off to space and having one final bout so that they can both go out swinging. What do you think?