Actually watching bands live. My wife and a number of people we go with travel around watching dance music, so the festival allow us to enjoy bands in the day and party at night. Know that'll be weird for lots of posters 😊
The great thing is when the music stops at 4/6/7am you are not ushered out by security that want to get off their shift like clubs/venues or lots of other festivals. If you want to head to the Stone circle until dinner time - crack on, if you want to sit in a booth outside the green peace tree at 8am with mates - crack on.
Basically if you're not bothering other people, enjoy yourself how you want to.