Fixed, tilting, or full-motion — which TV mount should I buy?

Across the reviewers we read, the rule of thumb is: choose a fixed/low-profile mount if your TV sits at eye level and you want the slimmest look; choose a tilt mount if the TV goes above a fireplace or you need to fight glare; and choose full-motion only if you need to angle the screen toward multiple seating areas. Community threads on r/hometheater repeatedly note that full-motion arms add cost and sag risk you don't need if you never plan to move the screen.