One book that changed me entirely is Another Country by James Baldwin... it's a complex, dark, narrative of interracial relationships in 1960's America... absolutely incredible...
I also love Walter Moseley and have read most of his books.. good, fun, short reads for a lazy day.
Probably my all-time favorite is Confederacy of Dunces by John Kennedy Toole.. always makes me laugh out loud... very loudly...
great picture of an over-educated, self-obsessed hypochondriac... an amazing story with lots of sarcastic humor throughout...
The Great Gatsby is another all-time fave... I also love Great Expectations...
WAY too many to list, actually, now that i am trying to do it...