From games old and new, there's usually been an area of a game that's caught your eye (or ear), like when playing a point and click game like Sam & Max: Hit the Road there's a quirky "whack-a-rat" minigame, or Tales from Monkey Island, when the protagonist, Guybrush Threepwood finds a stump with a hole, the game prompts the player to insert a second game disk to continue. What are your favorite details in a game you've played?
If I could give one personal favorite of mine, it's from Sonic Adventure when you enter Dr. Eggman's (Or Robotnik's if you prefer) airship, the Egg Carrier and find an assortment of cleaning robots wiping the floors of the Egg Carrier's interior hall. It's just so interesting to see this sort of thing in Sonic's first actual 3D game debut, and on Dreamcast hardware.
