Being tall and lanky - 6' and under 150lbs - it's been a challenge not to "snake" some while swimming.
Dan suggested to someone to put the pull buoy at the ankles/feet with a band and swim. What a revelation that was between breathing left vs right. Breathing left was much easier and much less "snaky" perhaps because the workload seems to be more evenly split between the arms. Breathing right was very unstable at first and I really had to speed up my left arm getting back to the front and pulling more (right hand dominant).
Don't know how long this drill has been out there but Wow. Just wow.