Let me explain, I think the problem with TT is the Japanese Anime influence off put quite a few viewers off. I think that the writing far outshines that odd quirk, but it could have done without the weird "Super Deformer" double takes (which aren't in every anime mind you). I think they could have done the same show without that stuff, and it would have been just as good. And there ARE a lot of cartoons that have anime influences... Invader Zim and the new TMNT (which even featured a shot by shot Akira scene reconstruction... brilliant!) without LOOKING exactly like them.
That said, the writing on the show made it better than it could have been. The titans all had nice chemestry with each other, and they really acted like Teenagers who happen to be superheroes. The show (Super Deformers aside) featured some great playful scenes between the group.
Unlike Legion of Superheroes. Which was that show's main problem. It wanted to be Teen Titans without being Teen Titans. The characters all seemed to not want to be there, and the playful teenagers were replaced by attitude ridden angsty teenagers. I really hoped to see a lot more playful stuff between Brainiac and Bouncing Boy... similar to Cyborg and Beast Boy in TT... but it was really slap dash, and took itself too seriously. And the playful moments even seemed grim. A good action show, IMO, is action AND comedy. I feel you can't be a true superhero without heart (Batman of course, is more of a vigilante... and there was some comedy in Batman TAS... albiet dark stuff from the Joker was most of it. But there was a playful attitude between Bruce and Alfred).
Of course, Legion didn't know what it was UNTIL second season, when they show really took off. Too bad Warners killed it before its time. but then again Legion was plagued with problems at the start. The Superboy thing comes to mind. For some stupid legal reason, they couldn't use Superboy, and had to make it Superman... but Superman is technically too young....