Books
Isaac Asimov "Robots and Empire"- while I love all Foundation books, the very end made this book stand out from other his works. Long story short- one robot commits horrible act against humanity, only due to highly hypothetical Zeroth Law. That was unexpectedly dark, but made me think about bad things that was done in the name of good.
George Orwell "Nineteen Eighty-Four"- I started to watch the world through this lens. Although I don't think that it is fiction anymore- I personally believe we are living in mild version of that distopia.
Music
Eminem "Slim Shady LP" and "Marshall Matters LP"- not a big fan of rap, but these 2 albums, just... well... just find and listen them, it isn't 100% gold, but 95% for sure.
Within Temptation "Silent Force" and "The Heart of Everything"- Just get these albums... I don't care if you are deaf, just get out and get them NOW!
Movies
Robocop- just because Robocop
Anime
Ghost in the Shell:Stand Alone Complex- not even worth explaining.
RahXephon- my first anime entry and it might be just me

Digimon Tamers- I don't like digimon, but this one just stood out, saw it by accident and got hooked up, was totally worth it.
Angels Beat- theme of ultimate end, it is always hard.
Steins;Gate- I don't even know why. It is just good anime.
Games
Contra- my first game

C&C:Tiberium Sun- my first entry in PC gaming, in RTS, in story driven games, in most things I like in games now. So this game have a special spot in my heart (yes, my avatar picture). So C&C4 was my first serious reason to hate EA.
Neverwinter Nights- my first RPG, and my first experience with Bioware games. That's why Mass Effect was my last reason to hate EA (and ignore all further EA games)
The Elder Scrolls 3:Morrowind- not worth explaining
Katawa Shoujo- made me realize that I'm ok with girls without legs (I know it sounds wrong, but fuck you!)
MammothBlade said:
Saya no Uta, Katawa Shoujo, and Steins;Gate impacted me pretty strongly.
must ask
Katawa Shoujo- which one? In my case it was Emi (when in the end she and Hisao visited her dad, it was one of the saddest moments in any game I experienced)
Steins;Gate- opening theme or ending theme? I'm sucker for violin so ending for me.