i started out with a mountain bike in my younger years, then i got my road bike like a year ago..i was content did not think about going to a mountain bike once since.
then i had the same question you had, that itch, and i picked up a frame to build a fixed gear bike, then i lost interest in my build, then i flat out bought my fixed gear.
i did not want a singlespeed because i felt it would be no different then my roadie.
the fixed felt odd at first, no coating, and now, i love it, my road bike is just sitting waiting to be used.
i dont skid, i use the brakes, and maybe ill do the skid thing later on but i rely on my brakes to stop, esp when im bombing down a hill at like 30+mph...