I started a new save over Xmas after shelving it on release for another game I forgot the name of. 1 or 2 main missions left, level 35 (done loads of side quests and free roaming!)
It really is a great game in a fantastic universe. I'll carry on playing after the final mission collecting things and finishing some side quests up. Might even start a Slytherin run and just be a dick to everyone. Channel my inner Malfoy.