If you're looking to expand your adventures beyond the vanilla quests in Skyrim you might take a peek at Clockwork, a mod that adds about six additional hours of playtime to the game.
Clockwork takes you to Clockwork Castle, a huge estate located in the Velothi Mountains. Once you arrive you'll be tasked with uncovering its mysteries, and history, through a series of quests. There are a few side quests but the meat of the mod comes in the form of the four-part main quest line.
Along the way you'll encounter new faces and and new enemies to take down. It's a fantastic ghost story with solid writing and impressive dialogue.
The mod is available for the Xbox One. It's not out for the PlayStation 4.