This is, without a doubt, one of the finest animated series of the millenial decade. Unlike many other superhero cartoons on TV, this one doesn't take itself too seriously, nor does it expect you to be an expert on the source material (the Teen Titans
comics from the 1980s by Marv Wolfman and George Pérez) going in. Even though it's a family-rated show, it never shies away from doing some very serious and profound episodes, using the tropes and clichés of the superhero genre and sci-fi in general to talk about themes that would be very difficult to convey with live action. It also has a big element of comedy, which helped this troper, who never really cared about superheroes, to accept this show and become a big fan.
The writing is clever and sophisticated, the characters are all well-developed and likeable, and even though some jokes fall a bit short of the mark, that doesn't diminish the series' sense of fun. If you're willing to accept the classic tropes of superheroes, this is a great series for any demographic. As of this writing, it runs on Boomerang, but the complete series is available on DVD. If you're into this kind of thing, or if you're looking for a good series to get your start on, I highly recommend Teen Titans