I play exclusively in multiplayer, and when I build decks I always do so with specialization in mind. Often that means a deck that expects to handle as much combat as possible, or a deck that expects to quest and bring a lot of willpower, maybe some location management, but engage no enemies (or rely on others to take care of them, when engagement occurs).
That 2nd type of deck can get really boring, because there are few decisions to make. Everyone goes questing, and I wait out the rest of the round. Have you built a specialized "questing" deck that felt fun and kept you involved in the game after questing was over?
Probably the best I've done was a Noldor discard deck with Cirdan/Narya. It had some ability to contribute meaningfully after the quest phase, plus there were decisions to be made about which cards to discard, the timing of playing certain events, etc.
Edited by GrandSpleen