I don't consider dragging and dropping to be a good way to select videos to play for a home theater situation. I'm probably a lot pickier than most people though. I tried at least eight video players on the PC before I settled on the one I'm currently using.
I will take another look at Cellulo once I get it running again. I'm having difficulty connecting to shared drives on my PC and when I open Cellulo it gives a 'connection failed' message that I can't get past. I have to force quit it to get rid of the message.