I'm actually currently finishing up Dragon Ball Kai. When I was a kid I'd be able to catch one out of three DBZ episodes at best, and yet it still never felt like I missed anything. DBZ defined its genre... it's a bloated mess of constant power creep. I don't know why it succeeded, but it did well enough to spawn countless imitators. Which are all more interesting, Bleach with its sword powers, One Piece with fruit powers, Naruto with ninjutsu. DBZ is a total blank slate of flying, punching fast, and shooting balls of light. What makes Vegeta's big ball of light (final flash) so much cooler than any other?
When I was a kid there was a show I liked better. It was more martial arts themed. The main character was based off of the Monkey King with his extending staff, and flying on a cloud. He'd fight mad scientists and robots. There would also be rival martial artists and mercenaries who were more menacing than any DBZ character without being a "world-ending" threat. There were also female characters that were relevant for more than just making babies. Where did that show ever go? Whoever wrote it makes Akira Toriyama look like a hack.
The only other show I ever remember as a kid that was similar to season 1 of Dragon Ball was Monkey Magic.
Alright, time to post my thoughts since DBZ ran my life in my adolescent years (fortunately and unfortunately :/ ).
What makes this series so great?
There were two great things this series taught me. One was determination. I didn't care much for Goku during my teen years when I watched heavily, but the one thing I loved about him was that he just absolutely never gave up no matter what the situation is and the situations got tougher in every saga(yes, even the Buu Saga). The other thing I learned was to try to make decisions that are best for everyone in the long run. Goku was iconic for this. He (almost) always made decisions with everyone else in mind (ex: not coming back to Earth when he could have after Gohan beat Cell).
Oh, and comparing to other animes, the fights are still unparalleled even as of today.
What makes DBZ the absolute best series one could possibly abridge?
OK, so I finally sat down and watched Abridged Seasons 1 and 2 after putting it off for so long. It's already been said. It's just so easy to edit and cut and paste scenes in DBZ. Not only that, there are so many flaws in the series that you can't help but poke fun at it. My favorites were...pretty much every Goku moment(especially what I posted previously) and the moments where Krillin was asked why he didn't use Kienzan during certain situations (ex: when Frieza was transforming, before half the Z Warriors were killed by Nappa, etc).
Cell Saga v. Majin Buu Saga: Which is the true best ending of the series?
Cell. By a mile. Buu was...nice, but you could tell Toriyama wanted the series to end after Cell since the torched was passed from father to son. The greatest thing about Buu Saga, to it's credit, was that Vegeta finally came to terms with himself, showing that it's never too late to change your ways.
Gohan v. Goku: Who is the strongest non-fused Saiyan? (sorry Vegeta fans, but you know he don't stack up)
Gohan, of course. For reasons already stated in the OP, basically.
Dragon Ball Z Dub v. Dragon Ball Z Japanese: An Anime series where the English version is better???
tl;dr warning
This is tough for me and there's a story behind why. I know I've stated before that the Japanese series was better, but I'm having second thoughts.
When DBZ first came to the US, we were getting the Ocean dub at first which I thought was awesome. Then, if anyone remembers, after Goku arrived on Namek and beat Recoome, the US didn't get another English dub for about two years on TV. During that time, I stumbled onto a few of the Japanese episodes as well as every single DBZ movie in Japanese. By the time we got English dubbed episodes again, I really took a liking to the original version and, I'm sorry, but when FUNimation picked up DBZ and first started doing the dubs from when Ocean dubs stopped airing it...sucked :/ . The voice acting was unpolished and even some of the script was bad(Krillin's epic "what a TRIP!" line). Bruce Faulconer had GREAT music but during the Frieza Saga it seemed....misplaced. Like they didn't know where to use what music during certain moments. They got it together though by the time the Androids showed up and it was golden ever since.
I can't hate on the Japanese version though. First it's the original and without the original, we wouldn't have...you know....an English dub :/ . That and you have to remember that DBZ originally came out in the (late?) 80's. So, it's pretty dated as far as voice acting, music, writing, etc. The Japanese version has not aged well, I will definitely admit that.
I don't really like the whole "English is better bcoz Goku has MAN voice" argument. I mean...really? Is it THAT important to fans? There was a reason the Japanese casted a woman: to portray Goku's innocence. To FUNi's credit though, Sean Schemmel(sp?) did an excellent job as Goku and it does make me wonder: couldn't the Japanese have found a man as well to still portray Goku's innocence? Maybe it's some tradition thing idk.
Dragon Soul v. Cha-La Head Cha-La
Ch-La Head Cha-La. I can't explain why. It just holds this place in my heart <3.
Stupid Goku moment is the same as Chou's(You can EAT it in REVERSE :D ), but I also like the one I posted earlier.
I won't touch on the rest, especially the Buu Saga since I pretty much feel the same way about it as a lot of other people in this thread. Further proof that whenever you're forced to do something for the wrong reasons, it doesn't exactly turn out well.