I don't use the right modifier keys out of habit. However, using Ctrl+Alt with Caps Lock still feels natural (I press alt with my thumb and caps lock with my ring finger, feels very natural). Also, I leave Ctrl still mapped to Ctrl so effectively I have two Ctrls on the left side and use whichever is more convenient. (Still tends to be Caps Lock in almost all situations)
Do you have an opinion on using the right shift/control?