I ended up using my mission on two bullets of ECs (although they didn't make or break me, it was nice to set me apart at most schools (besides UT).
I was involved in multiple community service projects and activities while on my mission, so I chalked it up to a volunteer-community service bullet. (organizing english classes, volunteer services at hospitals, hospice visits, park clean-up, playground construction at schools, anti-drug-alcohol programs at elementry schools).
Obviously I mentioned that I proselyted, was "in charge" of organizing meetings for the congregation, overseeing other missionaries in respect to securing housing, health care, etc, training. Great leadership stuff for a leadership bullet.
Taking two years off to do something like a mission shows commitment, drive, and a level of altruism and maturity needed in medicine.