As Blake so rightly says, Milton's Satan is the true hero of PL - however unwittingly and however horrified Milton might have been to think it. Rebellious, over-reaching, full of pride and arrogance, he yet leaps off the page at us with his intelligence and his rhetoric and his plots.
In a way it's not that surprising: taking classical epic as his model, Milton creates an anti-hero in the mould of Achilles, also driven by pride and the urge to impose himself on his world. One of the many pleasures of Milton's great narrative poem is precisely the identifications of classical epic conventions and the innovative uses to which he puts them.
It seems it's not fashionable to read poetry these days, especially not narrative poetry (as opposed to `personal' lyric) but it's a huge shame to miss out on writing as thrilling as Milton's. With his great rolling sentences and complex diction it might take a little while to get into his rhythm but the effort is well worth it. From the opening scene where Satan and his minions are thrown out of heaven, to the quiet ending as Adam and Eve walk hand in hand away from Eden, Paradise Lost truly is a reading experience to savour.