Of course you do not need an Automatic Watch! But they sure are cool! Rolex makes the most popular automatic watch on the market, though they are by no means your only choice. Many options are available made all over the world. Though the most popular and expensive automatics are Swiss made.
If you buy yourself an automatic watch you should also consider the purchase of a watch winder to keep it wound. Because automatic watches do not have batteries and winding the winder stem kind of defeats the purpose of the automatic to avoid the dangerous and costly practice of daily winding of a mechanical watch. (Dangerous to the watch: Winding stems can easily be broken.)
There is evidence that an automatic watch should always be kept wound to insure long life and to maintain collector value in the future. There are cheap watch winders and there are inexpensive quality watch winders, choose the later. Think of it as a prepaid maintenance contract. Think of the winder as a tax on the purchase of the watch and buy a winder that will last almost as long as your watch.