Columbo
Never again
I'm addicted to cruising - for my holidays! I think you would definitely get sick of it if it was an all the time thing. I met an elderly couple on one cruise that had been doing it for two years with just a couple of small breaks. With the same company, on the same ship. All the staff knew them by name and they displayed a sense of ownership to other passengers. But it can't have still been fun - surely.
The longest cruise I have done is 14 days but I reckon I could handle a month, but no longer.
I agree, you would get sick of it if you did it every day. Plus you would probably miss your friends and family back home.