Now that you guys are touching upon it, that is one thing that has been bothering me for the past two decades, the characterisation of Obi-Wan Kenobi in the PT.
In TESB, Yoda says he won’t train Luke because he’s too impatient and reckless, at which point Obi-Wan retorts “Was I any different?”. Lucas contradicted this when making the PT, as throughout the PT Obi-Wan is portrayed as a very observant, by-the-book Jedi who never questions the will of the Council, and I suspect that Lucas got the roles mixed up, as Qui-Gon is the one with the rebellious streak Yoda spoke of. When Obi-Wan insisted on training Anakin because of his promise to Qui-Gon, Yoda says he senses Qui-Gon’s defiance in him. Really?
Padawan Obi-wan was a bit reckless. He was listening to Qui-gon. When he started training Anakin that ceased to be the case. And we didn’t see the much younger Obi-wan, the one Yoda trained, so we can’t really say what Obi-wan said to Yoda was not completely true.