The fourth night!
1.) You will experience all of the three rotation restaurants...
2.) Going the first night will also allow this, but I would want to go to my regular rotation on the first night to meet my servers and possible table mates. (Hopefully you would not feel compelled to go request a change of table.)
3.) If you are wanting to catch the colors at AP, with your young child, you have a good chance of getting AP for the first night as your dining rotation... They do not repeat the color thing on the last night...
4.) The ship is crossing the gulf stream that first night. Often there is some motion... Wouldn't want to be a little, shall we say, 'green' while enjoying Palo.
5.) The master chef menu might be good, but how can that even begin to compare to the food and atmosphere at Palo?
6.) What a fantastic way to top off your cruise!
So, how is that for a few reasons to suggest the last night.... I hear that on the 4-nights, that this is the most popular night. So, you might want to be in line for Palo reservations if this is what you would like to plan.