Console Games That Have the Best Side Quests

Side quests are often seen as ‘extra’ content, but some console games have side quests that are just as good (or better) than the main story—so which games do you think have the best side quests, and what makes them stand out? Do the side quests have their own interesting stories (not just ‘fetch this item’), develop minor characters in meaningful ways, reward you with useful items or abilities, or take you to unique locations you wouldn’t see in the main story, and have you ever skipped part of the main story to do more side quests because they were so fun?