I think there are actually two amazing things here:

1) “[Y]ou somehow have managed to avoid the calcification of musical tastes that is a basic biological fact of age. How did you do that?”  I agree, this is truly exceptional.  In case you want to know what the near opposite of what you have been able to achieve is, here is a list of the ten albums I have most recently purchased:

• Candlemass — The Door to Doom
• Dream Theater – Distance over Time
• Overkill – The Wings of War
• Visions of Atlantis – The Deep & The Dark Live @ Symphonic Metal Night
• Avantasia – Moonglow
• Beast in Black – From Hell with Love
• Evergrey – The Atlantic
• Within Temptation – Resist
• Ancient Bards – Origine: The Black Crystal Sword Saga PT.