In addition to joining the Roll Call, you may want to check out and post questions on the World Cruising forum (part of Special Interest Cruising forum) on Cruise Critic.

Apart from sheer length of time, a factor with these world cruises is the huge variety of climate/weather conditions you may encounter - how much do you worry about that?

Our longest cruise to date is 14 nights, but we will be on Radiance of the Seas next year for 38 nights, Vancouver to Sydney and then will be in Australia for another couple weeks. A planning issue is what to carry in luggage to port of embarkation and what to buy there before boarding, and then what to plan to buy along the way, if anything - given limitations of luggage on airplanes.

You have a lot of time to plan - and hopefully the planning and anticipation will give as much enjoyment as the cruise!