The Zilla animated series is pretty darn good. The only major issue I had with it was unavoidable. Basically, I didn't like that it had to work within the framework of the Tristar film, but they show did its best to make up for some of the weaknesses. They even gave Godzilla his atomic breath back! That was nice of them.
It was clear to me that fans worked on it, or at the very least, the people that worked on it did their homework. We got a Destroy All Monsters inspired three parter, Monster Island, and was even formatted kind of similarly to the Hanna Barbera cartoon (no Godzuki though, thank heavens, lol). And they also add some new things like giving Godzilla a mate in one episode, and having a robot buddy that gets blown up and trashed in just about every episode (I swear this was inspired by South Park).
Some of the monsters Godzilla fought were pretty cool too. They did a Giant Cobra, a Giant Bat, and some sea based creature that seemed to be a mix between Biollante and a Cthulhu. Non of the Toho monsters showed up (although there is one monster that seems to be this show's take on Mechagodzilla, but I'll let you all decide).
And yeah, I actually kind of liked the characters. They were a tad more colorful than their movie counterparts. Actually, when I first watched the show, I completely forgot that some of these characters were in the movie, but they left more of an impact in the show. There is some romantic teases among the team, which isn't always my cup of tea, but they never go too overboard with it.
Overall, its a good show, and further proof that the 1998 film wasn't an all encompassing disaster. We did get some good things out of it like the Heisei films finally being released in the states, this show, and in sparked Toho to make more Godzilla movies, so all in all, the Tristar film showed that "from all bad, comes good".