I think it depends on what kind of driving feelings are u searching for.

I always preferred 2WD. But i think that if you live in cold\snowy places u should go with 4WD.

It depends on u. Driving my 991S (2WD), also on track, i noticed a wonderful traction, never expected before. Porsche has done some great steps forward with this new kind of Carrera i think.

Anyway 4WD traction and handling its a different thing. A question of taste. Not my taste, but a question of taste...