For some reason, most cruise lines assign their nicest and most expensive cabins to the highest decks, usually just below the pool deck (most likely because if you have a window or balcony, you have a more sweeping vista). Still, it is the pool deck that often causes the most noise problems, so if you do not want to hear scraping chairs at the crack of dawn or yee-hawing pool parties until the wee hours, go down a level. In fact, when it comes to noise, the best bet is to select a cabin that is both above and below other cabins.
Other pitfalls include service areas adjacent to or above your stateroom; show lounges or bars adjacent to, above or below your stateroom; and self-service launderettes across from your cabin. Other cabins that can be problematic are those that are situated low and at the back (because of their proximity to engine noise, vibration and anchor) or low and forward (because of bow thrusters).
In this age of mega-ships, cabins now come in all shapes and sizes. In addition to the typical boxy inside and outside cabins, you can find expansive suites, duplexes and lofts. Balconies also range in size from small affairs barely able to squeeze in two chairs and a drinks table to huge wraparound decks with outdoor dining tables and hot tubs.
Your room on a cruise ship is called a cabin (or stateroom) and is akin to a hotel room, but typically much smaller. Choosing a cruise ship cabin can be fun and challenging at the same time, and not just a little bit frustrating on occasion. You need to discover the cruise deck plan first. Cabins fall into different types or "categories," and some cruise lines will present as many as 20 or more categories per ship. Before you get overwhelmed, it is helpful to remember that there are essentially only four types of cabins on any cruise vessel.