With any tricycle gear setup the fuselage should be relatively level. Excessively nose high or nose low will cause Problems nothing severe but enough to make the airplane not as much fun to fly.

An airplane with a nose high attitude will takeoff ok in most cases but will be difficult to acheve a two point touch down (a three point touchdown is not desirable with any tricycle). The nosewheel will tend to touch first causing the landing bouncys just like a taildragger with the main gear to far forward.

An airplane with the nose set to low will tend to glue itself to the runway requiring more elevator and/or airspeed to lift off and when it does it will jump off wildly.

John