I am a deisel mech. It is a good job but it can get tough at times. Mechs are one of the hardest MOS's out there. The Corps can't move without their trucks and they are always a priority to get them back on the road.
I personally like the west coast a lot more than the east. I was born and raised in a Marine Corps family on the east coast. My dad was a air winger and spent a lot of his time either at Cherry point, New River, or Quantico. While Lejeune will be close to home for you don't overlook the bennies of being out west.
If you do decide to take up the challange and become a 3521 you can always ask me for some career advice to help you make the right choices to set yourself up for success.
Make sure you get everything in writing before you sign anything from the recruiter!
I am about an hour north of Atlanta (Marietta) and if you are in the area give me a shout.