K is for "Help me, Obi-Wan KENOBI. You're my only hope."

Obi-Wan Kenobi was one of the Master Jedi's portrayed by Sir Alec Guinness and Ewan McGregor. I never quite understood why Obi-Wan went from being hot and young in the the first three episodes, then 18 or so years later is an old, white-haired man. Apparently being a hermit in the dessert is hard on a man. 

I'm a big fan of the Ewan Obi-Wan in the newer movies. Obi-Wan tries his best to train Anakin Skywalker to be the "chosen one" Jedi they all thought he was supposed to be. Sadly, that didn't go so well for him. But they had pinned all their hopes on the wrong Skywalker, one generation too soon.

Poor old Obi-Wan didn't have much luck with Luke Skywalker either before he died in Episode VI. However, Luke eventually found his way, even though neither he nor Anakin/Darth were ever as bad-ass a Jedi as Obi-Wan.