Well... these are the shows i enjoyed the most.
Unfortunately Dead like Me has been canceled after the 2nd season. Nevertheless it is more than worth watching. It's about a team of grim reapers who need to gather souls of people who are just about to die.
Medium is about a psychic woman talking to the dead and working for the D.A. helping to figure out who killed who.
ReGenesis (not sure if there will be a 4th season) is a thrilling show about molecular biology, pandemics and hardcore science. Very addictive.