Vegeta, because he changed as a person and I'm trying to do the same, and we have "similar" personalities so to say, I also used to be a little agressive.
Yes! This! The other characters would still stand toe-to-toe with the big bads at times. I miss those days. Even Krillin fought Frieza for a time. His destucto disc was a real threat. [The destructo disc needs to make a comeback.] Piccolo had his strength transformations at times, too. In fact, didn't one of the movies introduce Super Namekian or something like that? Piccolo could still be doing some transformations. Once it got to Buu, all the non-Saiyans were out. I see no reason for that. Let the humans discover some crazy techniques that make them useful. Or maybe have a meditation/qigong session that unlocks more power for them (like Ultimate Gohan did). Bring those guys back. Also, I see no reason why 18 can't be fighting. She's stronger than Namek Saga characters putting her above the average Super Saiyan level. She even flat out said, she's still stronger than Krillen how about she go out and fight Frieza. She should be a main at this point I think.
My biggest inspiration for NoFap is that the whole reason Roshi can't fly is that he watches porn: https://thedaoofdragonball.com/blog/dragon-world/kame-sennin-kume-sennin-perverted-hermits/
Honestly, its Goku. But apart from him it 100% has to be Trunks he's the coolest out of everyone in my opinion.
Vegeta cause the hair and he's actually a good dad/husband compared to Goku. Too bad the anime treats him like crap (the DBS manga treatment of him is awesome tho)