Some of the Spin-offs i would like to see are:
-2 Obi-Wan films, one set between Episode III and IV, dealing with some adventure of his then, and another centered on a young Obi-Wan being trained, which would have to be a sort of Prelude to the saga, or Episode 0 if you will, introducing the universe to people who know nothing about it, Episode I didn't do that very well, i think this film would be necessary in order to give a proper start for those wanting to introduce the saga to others, but in chronological order.
-A Darth Vader story, probably set before Episode IV.
-Boba Fett adventure, take inspiration from The Man With No Name trilogy, you don't need your hero to be a goody-goody or for his past to be explained, as long as your story is interesting enough.
-Han solo before Episode IV, do a cool space heist movie.
-A film about a Rebel fighting in the war against the Empire, as we see the conflict from the eyes of the smaller players.
Not very interested in a Yoda Prequel at all, i prefer him as a secondary character, wouldn't mind some films set in the past during the Jedi vs Sith conflict, but would like to see technology from them being more archaic than it's been portrayed in the video games and comics, i don't want the past from 1000+ years ago being much more advanced than the present.