I always do get a kick ar humanity trying to "figure out" God.
Why wouldn't Satan rebel? he has free will like everyone else.
We rebel and we are "nothing", at least as an "angel" Satan has SOME measure of power greater than ours, supposedly.
Satan didn't rebel against God, he rebeled against US and is proving to God he was right about Us.
Not trying to be a wiseguy or anything, but I disagree with what Psacramento said above. The first issue -- why WOULDN'T Satan rebel? -- gets really circular real fast. I could ask, "Why WOULD Satan rebel unless he wanted something God wasn't providing? Why was he designed by God with the capacity to want things God didn't want him to have? Especially considering the outcome, which was imperfection and death." This is one reason people (atheists like me, for instance) question the idea that the creator's creation was perfect. We can run in circles with this one if we tried to discuss, I think.
As to the second point, about Satan being more powerful than us, he is still nothing compared to God isn't he? That is to say that there isn't any contest at work here. God could still squash him if he chose. So I don't see the difference.
I'm not sure what the last point changes. If he went against God's wishes, then he is still rebelling against God.
Just throwing some thoughts out there. Not trying to start an argument. :-)
IsaacJ