I'm not taking AJ. advice as I opted for the full World Cruise and have never been on Regent before. I've been on two Crystal for two long segments and want to get away from all the formal nights and really small cabins. If your going to spend 4 months on a ship the cabin is really important. So I think I'll be happy.
You do get homesick on these things from time to time especially when they transit complete oceans and companionship with the other passengers is important too. Had one really great experience and one not so good. Those 10 sea days in row parts get a little old and what I'm hearing about the Flat Screen TV's interactive features are very neat. I need to watch a good movie once in awhile. These things attracted me to this line.