I like fight club, American psycho, seven, the butterfly effect, snatch, memento, v for vendetta, and watchmen. Are there any other movies like these ones that I will like?

You might try Clockwork Orange (and other Kubrick movies), Apocalypse Now! Also, try Ridely Scott (1492 and Blade Runner).

Try
The Machinist (It reminds me of Memento)
12 Monkeys
Jacob's Ladder
RocknRolla, Lock, Stock and Two Smoking Barrels, Smokin' Aces ( All 3 in comparison to Snatch)
A Beautiful Mind (sorta compares to Fight Club)
Fifth Element

I'd also suggest you search for your favourites on Amazon.com and look at the "customers that bought this item also liked these" section of the page. Or put your favorites in the cart or wish list and then click on "recommendations" which suggests similar films based on your selection. Then go to the library :) Why spend money on something you might not like. Hope this was helpful!

more...
In the Loop
http://www.amazon.com/Loop-James-Gan...7452888&sr=8-2

A Scanner Darkly
http://www.amazon.com/Scanner-Darkly-Keanu-Reeves/dp/B000JMK6LW/ref=sr_1_1?s=movies-tv&ie=UTF8&qid=1327453254&sr=1-1

Smokin' Aces
http://www.amazon.com/Smokin-Aces-Widescreen-Jeremy-Piven/dp/B000O77SF4/ref=sr_1_2?s=movies-tv&ie=UTF8&qid=1327453355&sr=1-2

"The Jacket" is also a pretty cool movie that seems like it would be right up your alley.