Sixth form was a really good point in my life in many ways. I took 0.5 points off because I didn't get on with my bio teachers and one of them used to like making fun of me in front of the class, but it didn't set me back so it was just a minor nuisance in the grand scheme of things
Year 12 was ok and had a few good classes, but overall (considering I changed schools for sixth form) I really disliked a levels and my time having to study for them..