From personal experience..
Steering ball joints,
Axle pivot ball joints,
Front diff,
Viscous coupling in the transfer box,
Propshaft,
Cracks in the top of the radiator,
Radiator hoses,
Fuse box burning smells,
Suspension airbag cracks,
Shock oil leaks,
Engine or gearbox leaks,
Play in the steering box,
Uneven wear on the front and rear tyres,
Fuel cap opens on the button,
All windows and sinn roof,
Fan wooshes on cold start up and then backs off,
Any leaks around the water pump behind the fan,
Coolant around the bottom of the rad or coolant tank,
Front diff for noises on a test drive over 30mph,
Wheel bearings front or rear.
Oil leaks around the gearbox rad under the front bumper passenger side,
Oil leaks around the intercooler,
All doors lock and unlock, fob or key!
No warning signs on the hevac heater control panel,
Abs warnings,
3-4 presses of the brake pedal before pump runs again,
Unscrew the little filter on the suspension block and listen if the pump is on and off to much,
Height of the car constantly dancing up and down,
Headlight wash wipers working
Heated seats,
Coolant colour for contamination,
Alternator belt and pulley condition.
Most you know being a car enthusiast