Buying luggage with your vacation in mind is not the only think to consider before going shopping. Many of the manufacturers have been making reliable luggage ranges for years and are well versed in the needs of the modern traveller.
You will see your luggage as soon as it makes its way onto the conveyor belt so you won't have to fight for a position among all the other travelers. You could mark your luggage with ribbon, so when the luggage is coming through the conveyor belt you won't be looking for a specific type of luggage but rather a particular type of ribbon on the luggage. Many people take luggage that is just big enough to take all of the things that they are taking with them and then when they get there, they do not have any space for anything more.
One brand that this site highly recommends is Magellans. I always recommend carrying your luggage on.
It is not wise for the luggage to be out in the rain for long periods. Regular business travelers make these preparations before every trip to ensure the business side of it goes without a hitch. Cosmetics and toiletries now need to be placed inside your luggage, your carry on luggage can only carry liquids and gels in a clear, one quart sized bag.
Keep the toiletries minimal and only bring what is necessary, plus if something comes up, you can always purchase things once you've reached your destination. The next time you need to travel, say a little thanks to our ancestors for passing down such a practical, important product like luggage.