I have enjoyed X4 throughout the years since it was released. Quests can be fun, though I'm always struggling to get anywhere due to Xenon/Khaak taking over systems like crazy, I don't know why factions never even try to take back sectors from them. Also, it sometime feels like it's not even full release due to saves constantly randomly enabling "Modified" tag (saying game is modified and will no longer allow achievements) on my saves, so I have to roll back until the last time I manually saved which can be multiple hours.