Destiny is rarely great, but it is consistently good - enough to become a "comfort food" in the games world. The first person shooter style gameplay is familiar enough to most players, and executed well enough by Bungie, to feel interesting and accessible without requiring too much gameplay. Even as the game evolves over time, the designers have consistently hit good notes without reaching for brilliance or attempting to introduce radically new design ideas or even, frankly, fix all of the design flaws that have been around since the game's underwhelming launch. This is because the game must appeal to a large audience, and while it doesn't offer the best in PvP or the best in PvE, it does both well enough that players who enjoy either of those options can often agree to settle on Destiny in order to play with their friends.