NES- Beating Ganon for the first time in Legend of Zelda...I was like 6 and felt like I conqured the world.
SEGA Genesis- The wow factor of watching Sonic go Super Saiyan for the first time.
GB/GBA- Finding out the Link's Awakening was literally all just a dream.
N64- The utter dispear my 10 year old self felt when I first entered Hyrule Castle town as Adult Link, and realizing that Ganondorf had almost caused the apocalypse (again 10 years old, and it did look like it was hit by a bomb).
PS2- Final Fantasy X and watching Tidus fade away at the end of the game.
PS3- Skyrim...just all of Skyrim...
PS4- Seeing Kratos come to terms with his past, regret his actions, and try to teach his son that they must be better than the man he was.
Nintendo Switch- The shear wonder and amazement I felt while exploring Hyrule and slowly working my way up to settling a 100 year old score with Calamity Ganon.