My second favorite is Skyrim, I absolutely love an open world game, especially one where I get to pick and choose what do and not be forced into doing the story right away. However, the side quests eventually just become "fetch" quests and almost always involve and tomb or dungeon. Which gets real repetitive really fast, and once you hit a certain level, the main story becomes broken bc you are so overpowered.

All in all a good game for it's time, and still one I play to this day, but it has room for improvement, and stands at number 2 on my list.