Alec, Jensen Ackles' character in the sci-fi series Dark Angel was described as a "fun loving sociopath". The character's apparent lack of a conscience or impulse control meant he could do things that lots of people would want to do but would never actually do, which was fun to watch.
Some other similar characters I can think of are the demon Balthazar from Supernatural, Hannah and Dan from the BBC sitcom Siblings, and maybe The Cat from Red Dwarf (I strongly suspect all cats are sociopaths). Do you have a favourite tv character who ignores social niceties and just pleases themselves in a way you can vicariously enjoy?
Jensen Ackles, Image courtesy of Wikimedia Commons.