From normal fiction I would go with The Fountain Head
For historical I would recommend a book called The Coffee Trader, had to read it for a class and it was surprisingly good.
For Sci-fi: I've only read starwars books and the foundation series. Starwar The Young Jedi knights was a series I liked, but it was a good intro to reading series. Foundation is more though evoking, but I am not sure I would actually recommend it to anyone.
For Humor: Discworld Hands down. Or a Trashy, Trashy romance (any will do.)
For Romance: not a particular novel, but I like trashy ones.
On my reading Queue
The Light fantastic
Game of Thrones