It seems pretty universal for Marines everywhere.
If you're unmarried, the Corps will be a great place to go if you're willing to put up with the risks of being deployed. If you are married however, you will have a VERY hard time especially if you're of a lower rank.
Over here it seems like being married under the rank of E-7 is a VERY VERY tough life. I don't know if that's the case with the US, but I would imagine something of the similar nature. I'm sure some of our American servicemen here like 03 will be able help you with that part.
Who your CO and senior NCO is will have a strong bearing on how good the relationships in the unit are. The better they are, the closer the unit is.