Regulus nodded, although he couldn't imagine himself as the type to try to push for change. The thought of having to stand up to someone like Lucius Malfoy or even his own cousin, Bellatrix, made him feel a bit queasy in the stomach. Sure, he'd been raised under Pureblood ideals, but like his parents, Regulus didn't like to take an active role in what was going on around him. He wasn't venomous enough for such a lifestyle. He was a follower through and through, and often followed things he wasn't sure he believed in, if only because he was afraid of one thing: being alone. Sirius had instilled a pretty solid fear of abandonment in his younger brother.
"Courage is more of a Gryffindor trait," he pointed out, which he found funny because they'd been talking about not stereotyping people by house. It caused him to grin, and even chuckle a bit.