pretty cool thread. i just noticed it.
nirvana- nevermid ... although its not my favorite nirvana album, it was the one that kicked in the door for a ton of the music i love.
pennywise- unkown road ... the album that got me 100% into punk. when i was like 13 i got it and then began getting into more punk stuff.
smashing pumpkins- siamese dream ... great album. great songs. billy corgan writes some of the best lyrics ever.