I don't know if I can call him decent, but he does recognize what a decent man is supposed to be, and he remembers to try and act that way at certain crucial times, like when he thought he was coming off as the bad guy in his fights with Aaron. Not only was he a pig, he was a self-conscious one because he would give in against Aaron first, and that WAS for the cameras, even if the gifts for Tom and Alex weren't.
He proves my theory about how the most disgusting people can still coast in life, or get ahead of other better people, simply by having bright-colored eyes. If Hitler had pretty sparkling eyes, he might have lasted longer in Europe. But he didn't look the part. This dark haired guy with a cheesy mustache was shilling for a master race of blond, blue-eyed Aryans. WTF?
Anyway, yeah, Jay's selective displays of charm probably gets him by in life like it did in the house. Too many women look at the eyes and the teeth, and think that they can fix the rest. I don't have much respect for those kinds of women, because they are volunteering to be victims. He's bad news.