For those of you who don't know, flatwound strings are wound with steel ribbon instead of wire, making for a smoother slide and less string noise. They are sooooooo comfortable; it's like giving your fingertips a massage while you play!
Sure they're not quite as crisp and sustain-y as traditional roundwound strings, but they do sound great. Don't listen to any of those stuck up ninnies who insist that flatwound's are only for jazz, they can give you a great rock tone too! And did I mention how friggin' cool it feels when you play.
Trust me, go out today and pick up a set to try on one of your guitars. Several companies make them and they range in price. Yes they're a bit more pricey than regular strings but none of fortunes will fall significantly over a few bucks. If you don't like 'em then that's ok too, but you owe it to yourself to give it a go.
Until next time, adios