Find long questlines

In the Dragonborn DLC, the Tel Mithryn quests are mostly mage-related. Lore-wise, this is because Neloth, which is related to and gives most of the quests, is a wizard lord from House Telvanni, one of the Great Houses of Morrowind. House Telvanni is comprised mainly of mages.

• Azra's Staffs: Retrieve a staff made by Azra Nightwielder for Master Neloth.
• Briarheart Necropsy: Examine a Briarheart of the Forsworn for Neloth.
• Experimental Subject: Help Neloth by being a test subject in his experiment.
• From the Ashes: Help Talvas Fathryon by killing an ash guardian.
• Healing a House: Help Elynea Mothren repair the tower of Tel Mithryn.
• Heart Stones: Find a heart stone for Neloth.
• Lost Knowledge: Retrieve the Black Book for Neloth.
• A New Debt: Help Drovas Relvi with his debt to Mogrul.
• Old Friends: Find the source of attacks on Tel Mithryn.
• Reluctant Steward: Find a new steward for Neloth in Raven Rock.
• Telvanni Research: Extract a sample from an ash spawn for Neloth's research.
• Wind and Sand: Retrieve a copy of Wind and Sand for Neloth.

^{Source: UESP wiki, "Dragonborn quests" article}

You can tell by looking at the symbol next to the quests name when viewing it in your quest log.

The Bards College does not have a symbol of it's own, but instead uses the generic Side Quest icon.

Main Quest

Side Quests

College of Winterhold

Thieves Guild

Dark Brotherhood

The Companions

Civil War

This icon is shared between the Stormcloak and Imperial sides. It is the only asymmetrical item in this list.

Daedric Quests