Ok i am not just 27 but the Marine Corps would be my 3rd Branch of service. I have been in the Air Force and The Army. I really want to know i am crazy for wanting to do this at my age and with 8 year military service under my belt? Would the DI's eat me alive once they find out??? Please Advise.

What was your problem w/ the Army and the Air Force?
Inquiring minds want to know....

Well, I Joined at age 25-- so, as longas you have a re enlistment code RE-1, and don't have a problem with authority, I don't see a problem. Are you prepared to go through Basic Training again?
And, don't act like you know something in there, they'll eat you alive. You're gonna get screwed with regardless. Don't take it personally, The Marine recruiter may ask you if you're in it for the long haul seein' you've already served in 2 other branches..

Well, I'm a boot ass private, and I had two 28 year olds in my platoon, and there is one in my platoon here at SOI too. The DI's ive seen just make lots of jokes about how old you look, but its boot camp, everyone catches **** regardless.