F-mattox, I think your "cruise saturation point" may depend on your long, long time spent cruisin' as a professional performer.
At last, that was a job not a real vacation (although playing is a special kind of job ... it's playing!) and maybe you've burned that way a big part of your "cruise fuel distance".
I haven't even discovered my "c.s.p.".
Maybe I'll do, but after many, many cruises ... so I look forward to find it out.
All I can say, is that I realized the first disembarkation when walking on the dock with my handbag I looked up to the sun deck ... and really felt a lump in my throat.