What gender is best for boy cat?

So we have one pet it’s a boy kitten. May consider getting him a little buddy. Had him about 5 months now. (I think he’s 7 or 8 months old) We have two toddlers (1&4) sometimes he can be a little too playful with them as if they are kittens as well lol. He’s never mean by the way he’s very lovey but he will randomly jump on them and “bite” them playful like. He’s knocked the 1 year old down lol. Would it be best to get another male or female? Or does it matter? He’s neutered.