Persona 3
I've played a bunch of great games over the past few years, but only Persona 3 left a lasting impression. It was such a refreshing experience, and I remembered being addicted to that game, playing maybe 4-5 hours straight late at night, telling myself "just one more day." It blended two types of genres to create one magnificent game; being a high school student at day & taking classes, participating in activities, hanging out with friends, etc and then being a shadow hunter & dungeon crawling at night was a pretty fun experience.
Also, the music was catchy, and the story & characters were top-notch. But the gameplay was what won me over. I've been wanting to replay it for the longest time, but I don't have that much free time as I used to.
Persona 4 was also great, and it did fix most of the problems Persona 3 had. However, it didn't blew me away since it was similar to Persona 3.
