Genetics
I have been thinking about this. I really hope Im not repeating a thread. If I am, im sorry.
Now, Leia, you can see much of her mother in. From looks, to personality, to tendancy to begrudgingly fall for a "bad boy".
But what did she get from Anakin...besides a sudden and inexplicable accent when around the empire?
Same with Luke. Plenty of dad in him. Looks, tendancy to whine in his youth, belief of being held back, inability to keep all his appendages in tact...
But what did he get from Padme?