Couple of personal favourites, in no particular order, some of which have already been named by others.
I'm really into debut albums for some reason. They have something special about them and I often like them better than the most popular albums...
Oasis - Definitely Maybe
Joy Division - Unknown Pleasures
U2 - Boy
Jeff Buckley - Grace
The Cure - Three Imaginary Boys
Echobelly - Everyone's Got One
The Long Blondes - Someone To Drive You Home
The The - Soul Mining (or Burning Blue Soul, depending on your preferred definition)
Arctic Monkeys - Whatever People Say I Am, That's What I'm Not
Patti Smith - Horses
Roxy Music - Roxy Music
Nirvana - Bleach
Nine Inch Nails - Pretty Hate Machine
Plus some metal stuff, which I also listen to a lot, but suppose not many on here do (although I was pleased to see Holy Diver mentioned before).
Black Sabbath - Black Sabbath
Mercyful Fate - Melissa
Danzig - Danzig
Satyricon - Dark Medieval Times
Dio - Holy Dover
Metallica - Kill'em All
...and both Morrissey and The Smiths.