I remember when he was first announced to play the young Obi-Wan around 1997 and thinking: "the Trainspotting
guy? How's THAT going to work? He's nothing like Alec Guinness."
Turns out he did quite a superb job both paying tribute to Guinness as well as forging his own interpretation of the character as a younger man. Ewan and Ian McDiarmid were clearly the best things about the PT.