Clone Wars Season 3
Clone Wars is at it's best when it's either adding to the dynamics between main characters from the movies or actually putting some of the key Clone Wars characters in danger. Part of the problem is that anyone who is in the later movies has complete plot immunity so they're never in real danger.
At this point, Ahsoka is my favorite character. She's an original creation for the Clone Wars TV show. She takes the role of Anakin's apprentice and basically picks up his attitudes toward the force. That means that she sometimes rides the line between the dark side and the light side, which is where most of the interesting aspects of the force are.
There was one fantastic three part storyline in this season. It involved Anakin, Obi-Wan, and Ahsoka stumbling on a planet that the core of the Force flows through. The events on the planet have the ability to affect greater conflicts throughout the galaxy. It's inhabited only by three people, one represents the light, one the dark, and the last represents the balance. Anakin, Obi-Wan, and Ahsoka all have force visions and character development. The episode manages to tie in the entire prequel series of movies into the plot. It's amazing.
But that's three episodes out of twenty one. The overall quality and entertainment is better than seasons one and two so I'm hoping that trend continues with season four.
Honestly, at this point I'm mostly just watching Clone Wars to understand Ahsoka's story. She shows up as an adult in Rebels, which I'm loving, and I want to understand her better as a character.