We'll have to wait and see about my brother. He had motion sickness when we were kids. He uses that as an excuse. He does not like big crowds. He uses that as an excuse. BUT he has no problem flying on a plane nowdays or going to theme parks. In fact he loves theme parks. Disney World is one of his favorite vacations. Seems to me he has no problems with crowds, and he's outgrown the motion sickness. He did go and get the patch before the cruise though. Think his wife saw through his excuses.
Now it will be...I like or dislike cruising.