While the readings of the Last Supper story that accompany Communion are very powerful, the actual partaking of Communion is really not powerful for me. I think in part because the food is so insubstantial. I have long wished that we had pita bread or something evoking the unleavened Passover bread instead of regular white bread. (I really liked a few weeks ago at First Churches when we had bread the confirmation class had baked because that was bread to be chewed.) If there were a ritual sacrifice (by which i mean that i'm thinking of how strict Jewish law requires that animals be slaughtered a certain way, with all the blood drained, and the preparation be overseen by a rabbi) and i held flesh in my hands, particularly because i don't normally partake of meat (because of the pain/suffering/death involved), then that would be powerful to me. That would be a powerful reminder of the flesh suffering and sacrifice that Jesus underwent for me personally and for all of humanity. But Communion as is now, just doesn't do it for me. (I've also had Communion at Anglican Mass, and the foodstuffs there also totally didn't do it for me.)See the second "A Cheaper World" (A Softer World meets Groupon) here.
Edit: I am LOVING the various food+drink folks have had for Communion (yes, I have the comments on StalkerPin). And yes, I already knew about the Catholic gluten wafer thing.