Heck, I am making my 40th birthday a blow out, no limits cruise to Alaska! I'm fairly sure I'll go for a Cat 12 suite to spoil myself in style
Go crazy, the big 4 OH, make it a great time!
Some people like to go on the cheap, but the way I see it is if I am going to travel as far as I have to to get to Miami, or Orlando, or LA, I might as well make it worth my while. I always book Cat 8C,D, or E cabins, solo sailing or with someone. Alaska will be different, it will be easier because I can fly out at 11am (MST) and get to Vancouver at 11:30 am (PST) local time and have plenty of time to get to Canada Place to board the ship.