Some people above mentioned Paradise Lost, and how Satan is depicted there [at first] as a tragic hero of sorts.

He is intentionally portrayed in such a way that the reader will feel sympathy for him, and when Satan explains why he rebels from God, the reader is meant to actually side with him. It is only later that Satan's true nature is shown, and everything he says, including his noble reasons for rebelling against God are lies. Relevant to your point however is that those reasons, even though lies, convince 1/3 of Heaven to rebel against God (a case of Straw-Man Has a Point, I suppose).

I bring this up because what you said about how your beliefs are in line with his is exactly how many well-known and respected literary critics feel about Satan (as portrayed in Paradise Lost), among them Percy Bysshe Shelley and William Blake (a popular notion is that Satan is the unintended hero of Paradise Lost, and makes the reading for an atheist such as myself much more interesting on another level).

It is notable because the same things that Satan supposedly rebels against God for are ideals (he mentions egalitarianism, freedom from a tyrannical ruler among them) that most reasonable people would share.

It's not surprising then that people feel sympathy for the devil.

Satan makes many observations on the human race that secular people outside of the Christian morality system would likely agree with. Among them, a rejection of blind faith, a trait absolutely despised by Satan

Speaking about Adam and Eve after observing them in the Garden of Eden:

do they only stand

By ingorance, is that their happy state,

The proof of their obedicne and their faith?

Point is, Satan's morality can be seen, even when he is purposely portrayed as a villain, as being superior to that of God's in the Bible (hence why the GGLucifer Meme exists, and a general argument against God's benevolence).

Edit: Wow, that was a really long-winded way of saying, "I know that feel bro." Then again, I am putting off a 7 page paper on Paradise Lost (figures that it would come up on /r atheism after weeks of not seeing a single reference to it).