That most impressed you as being exactly what you liked when you were a teenager, that, when you hear it today, brings back the whole feeling of loving the music of a particular place and time. For me, it's "I Can't Explain."
By the way, did you know they are making a biopic about Keith Moon? Mike Myers is playing the role. I don't know if I like that or not. Okay for the messed up, older Moon, I guess. Maybe they'll have someone else for young Keith. A good suggestion: Jason Schwartzman.