If you had to pick a gameplay experience that you enjoyed the most out of all the experiences you've had playing games, what would it be? It could be mowing down soldiers in competitive fps games, grinding mobs in an MMO(if this is your answer I would be quite surprised), hunting gigantic monsters and barely making it back alive or just solving a really complex puzzle in a game like Fez.
My answer would be roaming an open world game with no objective other than exploring and improving my character. It feels like I'm going on an adventure that isn't scripted by anyone but myself and brings about a sense of adventure I feel is lost in most linear story driven games. The games of recent memory to me that I've enjoyed the most for this reason is Skyrim(obviously), Dragons Dogma, Dark Souls/Demon Souls and Blood Dragon/Far Cry 3.
So what is your favorite experience to be had in a game?