I'm a big fan of almost every game on this list, though it's far from the Top 10 I would devise myself. But I have a real penchant for this particular title. Resident Evil 4 made me a fan of horror games. I'd watch my brother play the original on the PS1 when I was a toddler, and dabbled with some scary things thereafter but it wasn't until I seen a friend playing Resident Evil 4 that I was truly hooked. After watching him play a very early level, I had to buy it for myself. Shortly thereafter I pressed start on my own GameCube version, with a different friend by my side, and started a journey I would never forget.
So it kinda goes without saying that I really like Resident Evil 4. It's a tremendous game and quite possibly the paramount horror experience. Of course, scarier games exist, and as time passes and graphics etc. improve, Resident Evil 4 will fall further down that ladder. That being said, it's still the defining Resident Evil game and an exemplar of survival horror.
You play as Leon Kennedy, an American agent who is sent to a mysterious village in Eastern Europe in search of the President's daughter Ashley Graham. Right away you realize that something bad has happened to every resident, and they desperately want to kill you. The crazed villagers are part of a cult, Los Illuminados, that controls them with a virus and answers to overarching series villain Albert Wesker.
The story is pretty cool and the atmosphere was second to none when it released. The good news is, if Capcom continues its current trend of remastering EVERYTHING, then this game will get the PS4/Xbox One treament in just a few years!