Imagine, you're in Heaven in the beginning as an angel.  Heaven is a glorious place and God has just unveiled a new plan, Creation.  In charge of you, besides God, is Michael, Gabriel, and Lucifer, all of which are great.  But Lucifer, despite his greatness and beauty, has a problem.  He has become corrupt and jealous of God.  He is poisoned by selfishness and desires to overthrow God.  So, he begins to gather an army of angels, creatures once friends with God deceived by Lucifer's lies and hatred for God.  God sees all of this and is saddened, for He loves all His angels.  But then, enough is enough; Lucifer attacks with those he has deceived to claim the throne of God, but fails.  Bitter from his failure, Lucifer sulks before an Almighty God, and God asks him, "What do you think I should do with you?"  Lucifer, in his hatred for God, responds, "I never want to see you, hear you, or feel you ever again!"  So God gives it to Him.  He gives him his own place, to Lucifer's surprise, but God is sad the entire time.  Then finally, once Satan and his posse are used to this, God says, "Goodbye," to which Satan replies, "Good riddens."  But then, something strange happens.  Satan begins to realize that light is dimming ever so slightly, making him curse God even more.  He feels that existence is slowly being stripped away from him: he feels nothing but darkness.  His mind races around for thoughts other than his failures.  He can not live, and he can not die.  He's burning, from the inside.  It's everything he's ever wanted, but worse.  The darkness is like a parasite, a fire.  He is separated from God's love.  Life has no meaning; death has no meaning.  This is an abyss, a chasm where nothing good ever happens.  It's like dying without an end: to exist without life (which only the Almighty can create) is to burn in a thousand fires.  He is on fire, but not by a temperature: it's a fire that endlessly whittles down his atoms.  It's like being entombed: his paranoia dilutes what his personality once was.  He knows nothing more than what he knew.  There is no perception, simply some meagre form of existence off of which to feed, a pain that lasts forever.  Hell, in my opinion, is giving the fallen exactly what they think they want: no God.  You have a choice: to be with God, or to be without.  But if He sustains life, I'd be careful about my choice.