Living off campus can save you money, and you are no longer under the long arm of Residence Life. Ever since the Boland Hall Fire a few years ago, the dorms are strict with guest policies and appliances. If you live in Boland, you are not supposed to be in another building past two in the morning. You cannot have a candle, extension cord, empty liquor bottle (even if it is decorated), or a toaster. You also have to walk in past a guard if you come in after hours. If you are in your rooms after hours, do not consider making any noise since the resident assistants roaming the floors will check your room out.
I personally lived in Boland and Xavier Halls, then moved to an off-campus house for a year, and now I am in an apartment. I made the move so I could have a car, since at Seton Hall, unless you are a senior, you are not allowed to park on campus. Living in a house is an amazing experience, but it takes discipline. I spent many hours in the library to keep my grades up. Housing is relatively easy to find in South Orange if you look early in the spring. Once May hits, if you have not found anywhere to live, you are pretty much stuck living in a dorm, which is not altogether awful, but good luck finding some privacy.