It's funny, those are the two biggest bands that I got unto late for some reason. And I really got attached to only one album by each of them. Taken By Force for the Scorpions, and Let There Be Rock by AC/DC. I know both bands have a lot of other good stuff, I've heard it, but for some reason I don't feel the need to own it.
I'm really only attached to one album each by Thin Lizzy (Chinatown), Kiss (s/t) too. Also the only Aerosmith that I have anymore is Draw the Line, although that is due to overplaying the earlier stuff. I just never replaced the vinyl with CD's.