I mostly prefer their live albums honestly. My most listened to albums would be A Night at the Opera, followed by Tokyo Tales and their 2003 Live album. They have a good mix of my favorite songs, and on top of that they are just amazing live. Live albums also don't have to have the best mixing either, as long as you get that wide feeling and energy.

Blind Guardians 'A Night at the Opera' is a great album I can sit down and just listen to through and through and do nothing else meanwhile. Few albums do that for me, as I tend to prefer listening to music while gaming or doing chores. Listening to that album with a pair of nice and rather flat pair of headphones that are open back really makes it sound better than back when I listened to it with crappy boomy headphones that I bought for thirty bucks.