Double sabers take practice, but eventually one would get used to using them. While they have more deadly striking power, they are less pricise than the single bladed varitey. Double blades also have a tendency to have more agression in their fighting style which is why they were not particularlly favored within the Jedi Order, especially by the time of the Clone Wars.
I am very much a right handed individual. The only thing that my left hand is good for is centering clay on a potters wheel, so I would weild a green bladed lighsaber in my right hand.
Meat is murder...... tasty tasty murder.
"Suggestion: Electrocution works well. Evisceration and Decapitation are also effective, or um, so I've heard."