i can see and respect where you're coming from cat. riding these ships for a living is certainly not for everyone. i've sailed with guys that were on their first ship and couldn't deal with the isolation and paranoia of drowning, etc, and had to be babysat 24/7 til we could find a place to drop them off. also sea-sickness is something that can totally incapacitate someone to the point that all they can do is lay in bed and puke, moan, and be miserable. this doesn't always happen just when the weather is rough. it can happen in calm seas too. many people don't know this about themselves until it is too late. you are lucky in the fact that you know this about yourself and wisely avoid it...
I was in the navy and the North Atlantic is noted for having some of the heaviest seas on the planet. I miss it dearly. Given the opportunity, I'd spend the rest of my life in that kind of weather. It's one of mother natures most awesome spectacles that could be witnessed. The men who serve on those seas are to be respected, whether it be military or merchant. They risk their lives on a daily basis, calm or heavy, the ocean is unforgiving and should not be taken lightly...hats off to the mariners!