Gee, I feel so simple and unorganized... I have never thought about price per person per day! I look at the total price and think "Is it worth it?" I seem to have a great time whether in insides, oceanviews and balconies so there is no "must have" for me. But I do look at different aspects apart from money.
Does the ship have good outdoor spaces where I can spend time instead of having my own balcony? Is there an observation lounge where I can hang out? Is this a "once in a lifetime" trip or am I likely to do a similar itinerary at some other time?
And after considering those things, "is it worth it?". Maybe, maybe not...