I'll mention one for the moment.
Linkin Park - Meteora
I'm pretty happy to see that somebody else mentioned a Linkin Park album on this thread. Anyway, this album is one of the main reasons why I got into music in the first place, since it was also one of the first actual music albums I bought on my own. I remember knowing it existed and I also remember saving up all the money I could just to get to a CD shop and buy it. Unfortunately, when I finally found it, I still didn't have enough since it was a little bit more than I had. The best thing was when my dad decided to help me pay for the rest because he knew how much I wanted it. So that night, I listened to it and fell in love with it and got to my favorite song
Breaking The Habit. I'm sure that's everybody favorite off the album since MTV showed that music video a lot back then. Anyway, i'm rambling a lot here, but this album was a huge step forward in what I think of music now, and it helped me get into many other genres and artist.