Both enrolled to become Ninja.
Sakura's biggest flaw was not in her ability of a ninja, but her not having the heart of a ninja. She was brillant,got perfect scores on all of her test, but when it came to Shinobi rule #something, she couldn't keep her emotions in check,
Hinata was an average student, from a noble clan, not much of a ninja ability, and she also didn't have the heart of a ninja, while she seem pretty emotionless, she was gentle.
Sakura became one of the world strongest ninja, proving that emotions shouldn't be concealed but turned into strength. She is a deadly combatant, one of the greatest minds throughout the nations, and the best medic ever, her abilities to counter poisons nigh instantly without seeing the ingredients is also valuable. Also she is damn near unkillable, just like her summon. Sakura is a great mother, and loyal wife, and a loving friend. Though other disagree, the manga and databook recognizes her as a Taijutsu specailist having higher stats that both Naruto and on par with Sasuke in hand2 hand combat. Not to mention her Taijutsu is rated equal to her medical ninjutsu, with is said to be the best in the world.
Hinata became a master of gentle fist apparently. She a loyal wife, lovely homemaker. And she became braver and can knit like its nobodies business, naturally and testiment to her gentle fist as they weave the chakra network
both have shown bravery, and put their lives on the line, but Sakura takes this because she risked her life for more than just her loved one, and made it her mission to not let anyone die so long as she has breath in her body. (And dont bring up Neji, because that can easily go against Hinata, so keep it cute)