I think if you raise them properly they would be more likely to be tolerable. Usually when I get Emails from people who have a nasty bird it is almost always a drake and they have almost always raised the drake from a duckling, as a pet. Then they're shocked the following spring when their lovely little ducky turns into the drake from hell. If you can raise them to be sociable without needing a 'puppy dog' companion, I think you'll be very likely to raise tolerable birds. At one point I grew a large row of cucumbers to use as treats for my birds & we'd sit out at dusk & slice cucumbers to feed & those ducklings would literally catch them in mid-air, they'd jump up and snatch them from your hands, etc. and I never had a mean drake in the bunch because they always maintained some fear of us. That's the thing I think most people get wrong, the birds raised as 'puppies' generally see their people as flock mates so once a drakelet reaches sexual maturity he does what comes naturally - fight for dominance.
That said, every bird is an individual and there is always potential for getting a mean one despite your best intentions.