Small festival (3000 people, 3 days, location up on a hill, no cars – you gotta carry your tent, luggage and beer up to where it all takes place). I love it.
Large festival with 45k people, usually great weather and excellent audience (no mud). Been there twice, saw Amon Amarth, In Flames, Heaven Shall burn and many other top acts.
U.D.O. in Speyer, Dec 2019
I like U.D.O. and dirkschneider and the old Accept records – I grew up with them.
Helloween – United Pumpkins 2018, Dormund, Germany
Wacken Open Air (WOA) 2016, Wacken, Germany
Largest metal festival in Germany, 80,000 metal heads meeting in the mud – rain or shine! Will come back 2022 (got tickets, yeah).