Army officers are more likely to put a higher priority on taking care of troops.
Marine officers tend to be more concerned with acting like Marine officers. Put it this way.
Marine officers never seem to tire of being saluted.
There is not a finer group of men that I have met than the Marines I have come to know in my time preparing for Officer Candidate School. From the group of Privates straight out of San Diego who help my girlfriend's disabled mother, to the Lieutenant Colonel who mentored me when I really needed it, despite his busy schedule, they have been good men.
After a hump, our drill instructor told those of us who had our sleeves rolled up to roll them down for a fireteam tactics class. No sooner than I had my right hand on my left sleeve to roll it down, the Candidate on my right was rolling down my other sleeve. I tell this story because a Marine Officer leads by example. Ductus Exemplo. The reason they never tire of being saluted is because they never tire of putting trust in their men; whether it is the Lance Corporals who are the lifeblood of the Corps, or the Gunnery Sargeants who are its backbone.
An officer of Marines is not just saluted, he returns the salute.
"The relation between officers and enlisted men should in no sense be that of superior and inferior nor that of master and servant, but rather that of teacher and scholar. In fact, it should partake of the nature of the relation between father and son, to the extent that officers, especially commanding officers, are responsible for the physical, mental, and moral welfare, as well as the discipline and military training of the young men under their command who are serving the nation in the Marine Corps."
Commandant, Maj. Gen. John A. LeJeune
Back to the OP, I would not recommend joining the military for college money alone. It is a big deal, and it is not an easy road. Regardless of the branch, they all offer you the same deals for college, and you get the same basic pay rate, so pick the one that fits you the best.
The Navy and Marine Corps are big on tradition and respect. The Corps is the smallest branch, and therefore has the smallest budget, especially since it gets all its funding through the Department of the Navy. They have to do more with less, which will get old to you, but it can work to your advantage, if you let it. Though it has fewer Occupational Specialites, you will probably be required to have a broader range of skills and serve in a broader range of areas. The Navy has a large selection of technical fields. Many good jobs can be had for those who have just gotten out of the Navy with some technical skill behind them.
The Air Force has nicer bases, and a larger technical MOS pool to select from. With any branch, though, you are put where they need you and you might not get what you want. Don't plan on choosing exactly what you want to do. It does happen, but rarely. They have recently changed their physical fitness standards to conform more with the other branches. If you are going in for the money and some basic technical, and you don't like boats, go Air Force. It won't be easy, but it probably fits what you are looking for.
The Coast Guard is physically demanding. Though they do go on floats, they are not typically as long as the Navy's. With counter-terrorism efforts increasing like they are now, the Coast Guard would be a good branch to look into. You will in all likelihood not go overseas, and will have a good background in both technical and practical fields.
The Army is a large branch, therefore their people tend to specialize a bit more than say a Marine (hence having a Specialist in addition to a Corporal). With that, I defer to those who have more experience in that branch.
But one friendly jab before I leave...
Why in hell can't the Army do it if the Marines can. They are the same kind of men; why can't they be like Marines.
Gen. John J. "Black Jack" Pershing, US Army; 12 February 1918
We have two companies of Marines running rampant all over the northern half of this island, and three Army regiments pinned down in the southwestern corner, doing nothing. What the hell is going on?
Gen. John W. Vessey Jr., US Army, Chairman of the the Joint Chiefs of Staff
during the assault on Grenada, 1983
God bless, and good luck in your decision.
Neal