Secondary ?
It was OK. It was just the same as many lessons - depends on the teacher and, to some extent what you are learning at the time, with the added in, 'it depends on the weather' which you don't get with most lessons. I think all my dc felt pretty much the same.
What I hated was when there wasn't enough time to get changed afterwards - dried if swimming, or washed and dried if doing something muddy like cross country, and then having to go through the rest of the day uncomfortable with drying mud on you or sit through the next lesson with hair dripping down your back.
All 3 of my dc have had the opportunity to do SO much more / so many different types of PE, which is great - finding your 'groove' as it were is going to be more likely if you are offered more opportunities.
I do like the idea of 'setting' for PE in some ways - as others have said, if you are new to a sport you don't generally get much chance to practice if those who are already good at it dominate the game.
I like things like 'Kwik Cricket' where EVERYONE bts for 2 overs and EVERYONE Bowls for 2 overs, and if you are out you lose points but carry on and if you get someone out you gain points but still only get to bowl your 2 overs. It is so good for developing skills, as opposed to the full game where, if you are out first ball, you don't get to practice, so have no chance of getting better. I'd love to see this philosophy adopted across more sports, where it is in the rules that everyone has a fair crack at the whip.