Venus receives more sunlight than Earth. The atmosphere is thicker and denser. A day on Venus can last many months. So it should be ideal for a solar powered aircraft.
Such an aircraft could stay high above the clouds powered by ample solar energy. Due to Venus's very slow period of rotation the aircraft could always remain in day side meaning bulky batteries wont be required. Such an aircraft could survery venus for a long time untill mechanical failures bring it down.
Since it is flying within the atmosphere much closer to the surface it should be able to gather more detailed data than an orbiting spacecraft. Would such a mission actualy be a good idea ?