This is a post for more personal reference than anything else, so it will not be the most coherent/well-explained stuff you could imagine. Comment if you have questions or really want to point out how awful this is and how bad I should feel about it.
AESTHETIC/VISUAL:
Final Fantasy X
Final Fantasy XII
Final Fantasy VII
Final Fantasy IX
Kingdom Hearts (original)
Shadow of the Colossus
Guild Wars 2
Jak and Daxter
Devil Summoner Raidou Kuzunoha
Legend of Zelda: Wind Waker
Chrono Cross
Okami
Yume Nikki
Odin Sphere
Bastion
WORLDBUILDING:
Final Fantasy X
Final Fantasy XII
Mass Effect
Guild Wars 2
Bastion
CHARACTER-RELATED:
Dragon Age 2
Persona 4
Mass Effect series
Final Fantasy VII
.hack//G.U.
Metal Gear Solid series
Tales of Vesperia
Phoenix Wright series
WRITING/STORY:
Metal Gear Solid 2
Silent Hill series
GAMEPLAY:
Persona 3/4
Pokemon series (generation 3-5)
Final Fantasy XII
The World Ends With You
Metal Gear Solid 2 and Metal Gear Solid 3
Assassin's Creed 2
Chrono Trigger
OkamiGranted, here I am just talking about games that have had an impact on me. Books, film, television/animation, artwork in other forms, and my own interests in real-world science, history, geography, and other academic topics have also had an impact on my creative output! As they arise, I will record them, hopefully in their own post.