Well according to a religious nut friend of mine, Satan thinks he's Gods equal. Which to me defeats the argument for a Satan.
When I asked him why God doesn't just smite that bitchass Satan down he said it's because "God want to play it out"
Er... Play what out I says confused? God being omnipotent already knows the result of the endgame so why does he need to play anything out? I smell bullshit!
Anyway back to topic, Satan is probably a chav of some rundown estate somewhere, wearing bling, claiming benefits, smokes, drinks and swears a lot and doesn't really think an awful lot as he's too stoned.