You know? I owned almost all of those. I remember being dissapointed with Flick of the Switch. I was blown away by Mellissa and Show No Mercy. I didn't find Kill 'em All as groundbreaking as the rest of the world, but liked it. I was addicted to Holy Diver, Power and the Glory, Piece of Mind, and Born Again. I thought Into Glory Ride was great. I will admit to owning Shout at the Devil, Metal Health, and Pyromania (and loving them), but for my money none of them stands the test of time. Just saying. Oh, and, yeah, You Can't Stop Rock and Roll is awesome. Truth is, all the Twisted Sister records were great.
If I had to choose one, and that's hard, I'd say Mellissa. But then I think of that album as one of the 5 best of all time. Funny how much good shyte came out that year!