I recall this being discussed somewhere but I can't recall where/when. The end result of the discussion was of what you were training for:
-If training to get competetive at Oly then use the same leg
-If training in Oly for a sport then switch legs.
I personally switch legs up until close to Max Loads.
"And for crying out loud. Don't go into the pain cave. I can't stress this enough. Your Totem Animal won't be in there to help you. You'll be on your own. The Pain Cave is for cowards.
Pain is your companion, don't go hide from it."