List 15 books you've read that will always stick with you: list the first 15 you can recall in 15 minutes. Don't take too long to think about it.
(Italicized commentary added afterwards.)
1. 1984 -- The book that scarred me and influenced my thinking more than any other. That was made even worse by reading It Can't Happen Here shortly after: the two books synergize scarily.
2. The 21 Balloons -- A young reader's book that isn't nearly well enough known.
3. I, Robot -- Okay, in retrospect Foundation probably made more of an impression, but this was the first to come to mind. I was a big Asimov fan as a young teen.
4. The Tripods trilogy -- Detecting my fondness for paranoid SF?
5. The Warrior's Apprentice -- Not the best of the Vorkosigan books, but delightful.
6. The Humanoids -- Completed the path started by 1984. One of the creepiest books I've ever read.
7. Francis Willughby's Book of Games -- Gotta get some SCA-topical stuff in here, and this is my absolute favorite on games.
8. Illuminatus! -- The reason I became a Mason. Seriously.
9. Charlie and the Great Glass Elevator -- Arguably my very favorite book of my childhood.
10. Sandman -- Have to include *some* graphic novel.
11. Orchesography -- Not the best period dances, but the best period book *about* dance.
12. Inferno -- I *adore* it, and have many editions, although I am especially fond of the down-to-earth Ciardi translation. (Especially the footnotes, which appeal to the student of politics in me.)
13. Amphigory -- I wanted a humor book; I'm curiously amused that this was the first one to come to mind.
14. Inherit the Wind -- One of my two or three favorite plays, and one that made an especially deep impression.
15. To Your Scattered Bodies Go -- Okay, no, I don't know why. But it did stick with me: indeed, that slang "Yaas" I use so often comes directly from Mark Twain in the Riverworld series.
Not by any means a deep list of the books that made the deepest impressions on me, but not a bad off-the-cuff collection of ones that have made a real impact...