I liked persone 3 and 4 as a game.
The anime, was kind of odd. Because persona is a sort of horror series a lot of the stuff that makes it unique wasn't there. Kind of like any rpg-to-anime but its still got great animation even if it became a bit..repetitive in story for the anime.
BTW: Persona 3>4.
Personally I'd stick to and just watch rerun of Avatar
*AHEM*
Let's get technical here!
Anime is only produced in Japan, so it's not anime. Tt's an American animation inspired in Anime.
Buuuuuut other than that, TLAB was seriously great. TLOK just doesn't do it for me. as Empire said, it's totally different from it's predecessor. Whole new era, everybody died... The story is "Meh". In TLAB, you see Aang learn to become the avatar. In TLOK, that part is just skipped and to the relationships we go.