I prefer freight far more over passengers, but at your level, it might not make sense- I'm going to assume you're looking at either Mountain Air Cargo or Empire, because if your profile is correct, 1700 hours isn't enough to get you in the Caravan at CSA or Baron or whoever else is out there.
Although MAC is a good company (I put in almost 2 years there), most FO's bail and go to the regionals, simply because the upgrade potential is better there. I myself left for ASA, because it would take me just as much time to upgrade at ASA (4-5 years) as it would at MAC, except at MAC the normal progression also takes you through the Caravan. (If you can start off in the Caravan, you're much better off) The end result- I'd make Captain in just about as much time, but I'd have jet and glass cockpit experience at the regionals, whereas MAC gave me neither.
As an FO, your pay is going to suffer- you do well your first year (25k), but it only goes up 1.5k a year- not very significant at all. You can make much more your second year at most regionals.
Also, there are no travel bennies, other than some jumpseats. May or may not be an issue.
You might be based with an airplane, like at LCK (the most god-awful run in history), or you could be a floater- getting perdiem, but always on the road. You get very little time off, because you usually travel on the weekend.
Oh yeah, you'll only average about 500 hours a year.
Of course, after flying at ASA for a bit, I left to go fly cargo, but that was in a DC-10 operation, completely different than going back to MAC. That all being said, I love flying cargo- no pax who bitch, no fat or gay flight attendants who bitch, no gate agents who bitch... but given the choice between a regional and MAC, I'd probably go find a good regional and park myself there for a few years.
Now if you can get offered a Captain slot at MAC, well, all bets are off then.