Some people don't know what they're getting into when they buy a watch. I was one of those people! Without extensive research it is almost impossible to choose a watch on the fly. Usually we look at price tag, complications and look of the watch. What is truly strange, however; is that people rarely look at movements and watch engines.
The average non-watch enthusiast, who happens to own a watch, will ask, "Why? Why is it important to know what type of movement a watch has?" It cost an average (if you go to a mid quality watch establishment) of $320 every 16 years, and up to 60hrs of your time. If you are an economical person and you have owned your watch for a few years now, and plan to keep it, you will probably spend twice as much on batteries as you have on your watch. There is a solution... go Mechanical.
Mechanical movements have no battery. A coiled main spring is their power source, the main spring must either be wound by you every day or so, or if it is an automatic it will be wound by a pendulum/rotor. The heart of the watch is the thing that keeps the time (accurate) it vibrates (half spins) at a calculated rate. If you buy a mechanical watch you will have to have it serviced (every 4-6 years) as mechanical watches moving parts need to be lubricated. Most watch companies have released some sort of eco friendly watch engine, so why not try out an automatic watch? Remember to always look at what watch movement you're buying into.
Some companies with (in my personal opinion) excellent automatic watches: Rolex , IWC, Oris, Alpina, and Christophe Claret
If you are on a budget I would recommend Tissot, or Swatch.