Re: The Prequels. Paul on how great Clone Wars and reflecting on the Prequel movies says "Lucas should have made a tv series". That WAS the plan. Around the time of Special Editions, Lucas did pitch a Star Wars series to HBO. At the time, HBO would have been the only network that both had the money and would allow the series to be non-kiddie. Lucas was envious of Babylon 5 having the luxury of doing a 5 year story arc to develop its characters. For instance, the character of Mollari was generally hated by fans the first season because he was seen as a buffoon and a weak attempt at comic relief. But over five years he went through an incredible arc where the character took an opportunity to grab power and set in motion the downfall of the galaxy. He evolved into a tragic figure and a fan favorite. But if B5 only had three movies to develop that character (while still dealing with the main plot and characters) the evolution just wouldn't have worked. In retrospect, you can see Lucas had a similar story arc planned for Jar Jar Binks, but simply too little time to develop it into something meaningful (I mean, Jar Jar did basically enable Palpatine to seize power and after Revenge of the Sith probably put a blaster in his mouth).
In that original pitch to HBO, after each season there would be a big theatrical movie for key moments in the Clone Wars- stuff that was too expensive to justify in a series like gigantic battles and climatic confrontations. They would serve as sort of cliff hangers for the next season when a time jump could occur.
Anyway, the HBO execs at the time didn't think a sci-fantasy series revolving around politics, intrigue, shifting alliances, universe-building, and character development would have mass appeal (*cough* Game of Thrones) and passed. Lucas went to plan B, started making the Prequel movies, but kept trying to get a "dark, gritty" live action Star Wars series off the ground at every break. A lot of material developed for these different series was used in the animated Clone Wars.