These top 3's are always insanely difficult to make, but here goes nothing:
1. Foo Fighters: The Foos in an afternoon slot with an hour full of bangers, what's not to love?
2. Freya Ridings: Incredible voice and atmosphere!
3. Elton John: We got a pretty bad spot in terms of sound (I think we were in the part of the field that is normally camping ground), but the overall atmosphere of being there with that many people, listening to all these great songs, felt like a once in a lifetime experience!