I had this same problem for a long time. I always preferred left rolling.
Start right rolling manuevers and in the beginning just use elevators and no rudder. Keep the roll rate slow and constant so you can clearly see what is going on - give some extra elevator correction so model does not dive. Dont worry on the changes in the roll rate. After getting used to this, start using the rudder and control the roll rate.
I found this the best way.....