What kind of car drivetrain would you choose to drive ? FWD or RWD or 4WD or AWD

FWD - Front wheel drive, RWD - Rear wheel drive, 4WD - 4 wheel drive, AWD - All wheel drive

I would choose 4WD. So I can get both fuel efficiency in RWD and power in AWD. This is good to operate the front and rear wheel separately and synchronised.