If you're an atheist, read this dislcaimer
[1]. If you're a theist, no disclaimer, just give me your response based on your beliefs.
Satan was supposedly an angel. God's right hand man ... (according to my Catholic upbringing anyway)... and he rebelled against god (I don't know the reasons why he rebelled).
So now he's in charge of hell, right? ... and he has the power to manifest in this world and fuck around with us trying to get more souls to go his way. It seems he serves god's purposes in adding difficulty to what is supposed to be a 'test' for humans.
... but what does Satan get out of all this? There's not much to do for him in hell... and the company sucks. I imagine millions of people howling in pain can be quite depressing to be around. His only entertainment seems to be in the methods he uses to persuade people to sin and steer them hellbound.
Is that it? That's his gig? I mean, what's he getting out of it? Is he really just doing it all for kicks?