So yeah, I was recently listening to some music I havent listened to for YEARS!!! Like Mr Big and some Yngwie classics, and I just got sooo excited man. Some of that stuff was just sooooo good and still is really. Still makes me happy to hear it!
So what stuff havent you listened to for many years that when you hear it again, it takes you back to good times of sorts or whatever...? 
I will go first:
Definitely Def Leppard's whole album Hysteria does it for me. Oh its such a classic and I still love to hear it. Good memories
How about you?
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