Indeed, my left side also has felt somewhat more "blocked". Every once in a while i'll just focus on my left foot or my left side, and I can feel the energy balance out in my body, from the foot to the leg and up (sometimes it'll start as a grounding sort of buzzing in my left foot). I dislocated my left shoulder once too which definitely doesn't help that left side imbalance. For a while, every time I'd meditate and my body would relax itself enough, I'd always feel this underlying knot in my left shoulder (hehe, meditation works on the body just like the mind). I've found allowing a bit of automatic yoga would help that tension.
When my left and right are balanced, I can definetly feel much better the awareness just flowing up and down my spine.
I find it a bit interesting how the "up and down" aspect of yoga is always talked about, though left and right much less.