well the attraction of the single speed is definitely the "less stuff to break" aspect. it is, of course, a trade-off when you have a serious hill in front of you. once you find the right gear, it isn't that big of a deal though, you just have to find a balance between being able to get up hills and still being able to get speed on flats. it's not the quickest or the most efficient, but it's simple, and there's something to not having to do a lot of thinking.
if you want to know what it's like, just find a good middle gear on your bike and don't change it. you'll get a sense pretty quick of whether or not you want a SS of your own.