Yeah as ga_trojan said,
I recently knocked back a job on a Caravan as I currently am flying a Navajo and the bloke couldn't understand why I didn't want the job.
Multi command time is what airlines etc want. Doesn't matter if you got 3000hrs single engine turbine if you haven't got at least 500 ME command then forget it. Shame it's that way as I would have liked to fly a turbine but I aint leaving a twin job to fly a single.