What are some albums (metal or not) that you didn't really think much of when you first listened to them, but gradually found yourself liking more and more as time went on?
Four for me are:
Megadeth - Peace Sells... But Who's Buying - I was still more or less in the infant stages of my metal fandom when I bought it, so I found the album rather boring (mostly because I wasn't used to that kind of complexity in metal music). But as time went on, I grew to appreciate it more and more. And now I consider it one of the best metal albums of the 80's.
Slayer - Divine Intervention - See the old DI Hit or Miss thread for details.
Ozzy Osbourne - Down To Earth - Ozzy really hasn't done anything too terribly new or innovative with his music since 1991's No More Tears. So, logically, this album sounded too much like Ozzy-by-numbers when I first heard it. Listening to it more, however, I found myself gradually liking it better. And while it's flawed, there are quite a few good songs on it. Facing Hell, No Easy Way Out, That I Never Had, Black Illusion. I even like Dreamer.
Demons And Wizards - Touched By The Crimson King - I'm actually listening to this album right now as I type this message. For a power metal album, it's not very heavy. And it's basically Iced Earth with a different singer and slightly slower tempos. Once you get used to it, though, you see that this is actually a great album. I wish Spatial Architects was on every version of it, because that's actually one of its best songs IMO. My favorite, however, is Beneath The Waves.