Some people might say “be careful what you wish for”.  I wished for 30′ waves and got them and was thrilled.  The Drake Passage is notorious for huge waves and rough weather and where else would I ever get to see them.  The first night out at 4AM (daylight outside) we started to roll and rolled for two days.  Waves broke windows on the 4th (my deck) deck.  Out of 110 passengers only about 25 made it to meals, I don’t think the others could have eaten if they had gotten to the dining room.  The beds had big straps to keep you in the bed.  Encouragement for movement was the boat had ropes in the halls and barf bags hung every few feet.  I tried not to be too happy but I definitely was, it was fun.