One of my favorite ways to try and understand a character is to ask myself, if I asked this character what they thought their biggest flaw was, what would be their honest answer? And then looking at exactly how wrong they are and why.
For instance, if Anakin were to be honest, I think he would say something along the lines of, "I don't know. I'm the Chosen One. I'm supposed to be able to do anything. Everyone knows it. I should have every ability to succeed and be what others need me to be. But still I fail in my duty and hurt people. I don't know what's wrong with me. I have every advantage and reason to do right but I still fail. Everyone can see this deficiency in me and I have no excuse for it."
Then, if you asked Obi-Wan, I think he'd say something like, "I allow myself to prioritize my personal stakes over my principles time and time again. I fail to properly help those I care about, because I am unable to divorce from the temptations of attachment and abide by the Jedi Code to support and guide them as I should, rather than the way I want to. I should trust in my betters to dictate my behaviors, but I have allowed myself to lack integrity for the sake of intimacy."
And then if you asked Padme, I picture her true answer being something like, "I am not the leader I should be. I let others get hurt on my behalf and sacrifice themselves for me, because I have made myself too valuable of a piece for my people/cause to lose, which means allowing others to protect and serve me. All this, and I secretly wish more than anything that I was not important to anyone at all, because my happiness actually comes from connections. I don't deserve to be in this position. But to back out would be selfish."