At 27 I'm surprised a Marine recruiter gave you the time of day. At 25 I went to see about joining the Marines and he told me while he had no doubts I could handle boot camp and the fleet, he said at my age I was too set in my ways and I would hate every day of it. Most Marine vets I've known said that was dead on and the Marines like bringing in 18 year old kids who don't know any better.
So I did the next best thing, I joined the Air Force.
. I think the recruiter was right. I was too set in my ways and hated even a psuedo branch of the military. But, I had fun shooting mortars and Mk19's, partying all over the world and pissing in phone booths while drunk off my ass.
I'd say right now just worry about getting through recruit training and worry about accompanied orders and all the other bullshit later.