OP: I understand completely what you mean about Requiem For A Dream, even though it's made my list of influential novels - the writing style was alien yet intriguing to me, but then again I'm a fan of Jazz, so the math may be fairly simple.
On The Road by Jack Kerouac was such an inspiring read for me - it was refreshing to know that not all alternative literature of the 50s was limited to bland, self-absorbed garbage like Catcher In The Rye for a start, but the real delicious main course was the book's fundamental moral; Whether you're young, old or simply feeling confused about your next direction, just pack your bags and travel. Not only do you have some of the most down-to-earth observations of life as we know it, but, with such a writing style, we also find some of the most honestly beautiful descriptions of the urban and natural world in which we live. An essential read by any standard.
Excuse me for being a fanboy, but Get In The Van by Henry Rollins was another book which followed in the vain of escapism that On The Road had carved a niche for in my subconscious. Rollins' no-bullshit approach to the five years he toured with Black Flag and some of the uncomprimising brutality and hardship he was subjected to by fans, venues, promoters, other bands and, not being too proud as an Englishman, British Movement Skinheads by the ton on the way is terrifying, to say the least. Even though he expresses no regret for giving up a steady life in favour of a, quite literally, starving gig, his matter-of-fact writing style and the ease of which he shrugs off some of the potentially traumatic events leave little room for comfort in the knowledge that he is a sane man. Nerve-shredding, eye-opening and yet stangely life-affirming and refreshing, Get In The Van is a brilliant book.
Death Of A Mafia Don by Michele Guittari, whilst picturesque in it's title, is a textbook example of how to write a crime thriller. If this list were film choices, this would be The Third Man; Guittari realises that solving a crime within the confines of a narrative is a matter of speed and strategically placed information leaks, both of which are exercised beautifully in this novel. Whilst not exactly pulp, the book is definitely juicy and never slackens the pace with tense confrontations from everyone from the police and prosecution services to press officials, Mafia kingpins and a shadowy fixer, who for the purposes of non-spoilers shall go unnamed. As you may have already guessed, the scope of characters in the narrative is breathtaking for such a short novel. Whether you are a geniune fan of contemporary crime fiction or just sick of the Grishams and Pattersons of the world, Death Of A Mafia Don is perfect.