Well let's go through a few choice characters
Goku-As time has gone on, I realize what FUNi (or more like ocean) was trying to do with Goku and that is, somehow keep him as the strong, lovable idiot that he is but give him more of a superhero edge during the fights, as opposed to Norozawa who does the role as 100% strong, lovable idiot all the time (except for maybe the first time he went Super Saiyan). And if we look at it from that note, Sean actually does pull it off well. The funny thing is, when Goku is doing comedy scenes like, let's say, the Broly movie. "This has some pretty good acoustics in here" and has his voice go into a bit higher, more [strike]Spongebob-ish[/strike] comedic tangent. It can be jarring. Heck it was jarring when I saw my first few episodes on Toonami. But for what it's worth, it's not like Schemmel portrays him as over-the-top to the point that the role becomes annoying like, oh let's just say, 4KiRAB Luffy. Now that's how not to do a role if anything. But does Sean compare to the original. Honestly, if you've understood how Goku sounRAB, no, not really but was he correct for the role...yeah, he was. And if I may, I think he must have destroyed his vocal corRAB a little bit more times than Nozawa did. Nozawa's yelling is hoarse and strong but Schemmel's is deep and full of awesome. Like when FUNi would add effects to his voice like this one
(can I just say, I laughed really hard when Cell goes "nnnnOOOOOO!")
Kid/Teen Gohan-Well, I think that I can say that FUNi has always had the best track record when it comes to kid's voices as I don't find myself instantly switching to the Japanese track for voices like Czeslaw in Baccano or Chopper in One Piece or Nina from FMA. And Gohan isn't really that much of an exception. Next to Piccolo, Perfect Cell and Kid Buu, Stephanie Nadolny's Kid/Teen Gohan is one of my favorites since he's actually pretty good. I mean, I know I'm going from the fact that she did Kid Goku too so obviously if you liked that, this would be good too. (If I may, that was a very cool job of FUNi to rotate VA's like that to keep consistency) I guess I can't really compare it to Nozowa completely since she's, you know, Goku, but they both pull of kiRAB well and I also like how Teen Gohan's voice got a bit lower as the Cell saga went on.
Adult Gohan-Huh. Well, you know, I don't have a lot on this one. Hebert did okay but that's just it. He did okay. It wasn't anything spectacular that I'd seen and I liked Nozawa's more....Hm, guess that's it then.
Kuririn-Oh boy, this is gonna be hard. Mayumi Tanaka is...just so amazing at what she does. I don't even think nostalgic memories of Strait can compare to....freaking Monkey D. Luffy being Kuririn's voice. But I'll try. So what does Strait bring to the table that Tanaka doesn't? Well, if anything, he was definitely the right role for Usopp as his voice gives off that distinct "coward" voice. Kind of like Greg Ayers' Shinji (or anybody else Greg Ayers does, I notice he's typecasted a lot) That aspect of the voice does apply very well to Kuririn at least during the dialogue bits. But, it's just so hard to compare to someone as so naturally talented as Tanaka.
Piccolo-My favorite role ever from Sabat (though Zoro is catching up). One of the very few roles that I will completely and proudly say, "Yes, I loved this even more than the original Japanese voice." Why? Well it's not that Furukawa's bad at all. It's not because it's great but I just felt Sabat's is better because I really get that wise warrior/mentor feeling that the character grows into later. (And can I just say, I'm so glad that FUNi did not attempt to copy the earlier dub for Piccolo because that was awful!) I listen to Sabat's Piccolo during serious moments and I really hear the knowledge in his voice. Sure, Sabat's definitely one of those guys who you can tell who he plays in other anime but when it comes to Piccolo, I'd pick him any day.
Vegeta-Okay, here we go. Let's do this.
First, I'm going to say, that I despise how Sabat did Vegeta when FUNi started doing Z. It sounded so gruff and just not right at all. Sure, back then I didn't know how the original sounded or that Horikawa is like a vocal god. (Funny thing, I thought that Vegeta was Nobuyuki Hiyama at one point ) So, let me just say that I'm glad FUNi grew into Z as well as they did because when I have to watch clips like this one that show really bad acting on Vegeta's part, well, I think you can guess the annoyance running through my head
"You're so weak, I won't even have to break a sweat.....I'M ACTING!" or
Now, let's see when we get into the Buu saga and Sabat stops sounding so stilted and cliche, that's when I can tolerate him the most. Funny thing is, I feel he sounded the best in (ugh....) GT of all things like when he threw that FINAL SHINE...ATTACK at Super 17. I guess all that's said has already been said. Sabat's Vegeta is completely a love it or hate it voice but if I had to pick, I'd say "switch the voice actors and keep him as Piccolo." Maybe get Johnny Yong Bosch. Yeah, that would be cool.
EDIT: I will add that yes, this all just opinion and that "It's just a TV show, I should really learn to relax"
EDIT2: I love Dub Android 18's voice.