[Roberton3]

And like Slytherin, there are a few of them (Sirius Black) that aren't so bad.

Sirius Black was in Gryffindor, not Slytherin (despite being from a family line of Slytherins).  Perhaps you're thinking of Severus Snape?

(I can't remember useful things at all, but random trivia like this gets permanently stuck in my head.  Go figure.)

[Roberton3]

And like Slytherin, there are a few of them (Sirius Black) that aren't so bad.

Sirius Black was in Gryffindor, not Slytherin (despite being from a family line of Slytherins).  Perhaps you're thinking of Severus Snape?

(I can't remember useful things at all, but random trivia like this gets permanently stuck in my head.  Go figure.)