another vote for taking the time off. 👍
a lot of people have mentioned taking a break from the intensity of school, with which i wholeheartedly agrree. now that i'm in med school, i find that it pretty much consumes my life. whereas in undergrad i studied (sort of), it was my extracurriculars that kept me busy. in med school, it's actually school that keeps me busy and it's hard to find time to do the things that i did as an undergrad.
i really appreciated my year off, even though i didn't do anything particularly exciting or helpful for my application. it gave me a chance to wind down - esp important for me after feeling burnt out midway through my senior yr. in addition to working part time & volunteering, i hung out with friends, read lots of books, visited museums, went to concerts and the theater, went to beaches and parks, etc. (these aren't unusual things, but to be able to do them all the time was refreshing). and though it was difficult adjusting to the lack of independence of moving home, what i probably value most about my time off was the time i spent with my family. i learned recipes from my mom, talked politics with my dad, saw my cousins and their new families, hung out with my 16 yr old brother (whose teenage yrs i had largely missed while at college). coming back to school, i definitely felt re-energized and looked forward to the next phase of my life.
anyway, if you're feeling like you need a break from the hecticness of your life (during my senior yr, i often found myself wishing that i could freeze time and escape to a deserted tropical island) then i think time off would be good for you. kind of your last chance before you begin med school and the rest of your life.
p.s. when i first told my parents about my decision to take a yr off, they weren't happy either (and trust me, i have overbearing parents) but it's your decision and they'll deal.