Disneyland Paris is an incredible place. Usually the lines are pretty small except for the mountains.
Be sure to experience Phantom Manor. Search the web for the story of the ride. Knowing the motivations of the characters and the reason for what is happening makes the ride 10 times more enjoyable.
Indiana Jones is quite a rush. It's a looping coaster backwards!
Space Mountain is where you NEED to go. Big Thunder does have a unique beginning and end but the rest is just a smaller and slower version of the dl and wdw versions.