Some of my Sims would love to have that 'Bossy' trait you came up with.
I would add a 'Gruff' trait. This Sim is not too keen on overly friendly interactions, and he might sound a bit harsh when telling the neighbourhood kids to stay off his lawn (though he has the option to tell any unwelcome visitor to take a hike). But he cares about his close friends, even if he only shows it with approving grunts and stoic nods. Even when he's happy, he'll keep a reserved mood.