"I've been deeply influenced by Aristotle's idea that virtue is a habit, something you practice and get better at, rather than something that comes naturally."

For an individual who has studied classics, you would expect that he would know that all the ancients, greek and romans, considered virtue as a habit, not Aristotle alone. It was rather a cultural thing which is why the Romans emphasised training their pupils to be good citizens by teachers of great character so that they can imitate their habits.