When comparing privacy between American Airlines First Class and Business Class:
In First Class, especially on domestic U.S. routes, you’ll get wider seats and more leg-room, which naturally feel more private.
On the other hand, Business Class (on long-haul/transcontinental flights) tends to offer lie-flat seats and a premium layout, but the cabin is often larger and less exclusive.
Bottom line: For sheer personal space and fewer nearby passengers, First Class usually offers more privacy; if you’re looking for a lie-flat bed and comfort over exclusivity, Business Class may suffice.