It happened to me yesterday night, with Darksiders 2.
Clearing the second big dungeon in order to restore "that" place in order to receive an important key, I just sat down and enjoyed the view, while the valley returned to life with all the water flowing back, with some epic music in the background.
Up to this point, there were puzzles where I would stay 5-8 minutes wondering what the hell would I do, and finding the solution never felt so good. Why was it good? Because of the great combat the game has. Death is fast, agile, strong and a witty character, which never comes off as dull or overly arrogant. It also has a big open world to explore and do whatever you want, while riding a horse.
"This is it" I said, I found a game where I could actually sit down for more than 5 hours and only turn it off because it was late.
Man, I fee like a kid once again.