You've got one good thing going for you already- you have a job. That gives you the ability to be selective, and to "interview" prospective corporate employers, just as they will interview you.
As Spaceball1 once said, "There are a few GREAT corporate jobs, there are some GOOD corporate jobs, and there are a bunch of "Shelters for Battered Pilots" . . . . . A GREAT corporate job, or a GOOD corporate job is worth leaving your current job for, but you don't want to leave for the aforementioned "shelter for battered pilots", so you need to learn the intelligent questions to ask so that you can separate #1 and #2 from #3.
I would offer this partial list, and current corporate guys can add to it:
1) Staffing- how many piltos per airplane? For domestic, anything less than 2.5 pilots per plane will not allow anyone a semblance of a schedule, and vacation and requested time off will almost certainly be a problem.
2) Jet usage- how much of it is for the company, and how much personal use? This ratio, along with the weekday/weekend flying ratio will determine your Misery Quotient.
3) Training- will you be typed in the aircraft right away? How often will you be going to recurrent training (91 only REQUIRES the PIC to go once per year). Better departments pay for more frequent training, IMHO. Never go to an operation that requires you to pay for your type. If they skimp on training, they'll skimp everywhere else, too.
4) The best job, IMHO, is at a real, bona fide corporate flight DEPARTMENT, and the worst job, again, IMHO, is the "rich guy with his own jet". That is the job where your personal life/family life doesn't mean squat, and you at his beck and call . . . . worse than being on reserve. That, and "Air Ambulance" are the jobs to avoid, at all costs.
Keep the list going, guys . . . . . .