Contrary to what has been said, the job has changed considerably over the last few years.
Airmanship is now a dirty word and you are expected to adhere unquestioningly to company SOP and doctrine. The management and training dept attitudes are increasingly dogmatic and less pragmatic, and the newer/younger the manager or trainer, the worse it usually is.
Work rate has gone up massively - many pilots now fly to the legal maximums month in, month out, with no let up.
Attitudes to pilots have become bad. Some companies strive to make conditions as bad as they can, and even seem to deliberately break up families simply because they can over issues like basing. Threats and bullying are rife in many companies now, but all off paper so it is impossible to fight back legally.They like to have their spies, too, so you have to watch what you say, even in the cockpit.
Pay is a pittance of what it used to be, so don't expect a decent lifestyle while repaying the costs of the retraining required and paying for your current mortgage and digs in whatever base you end up.
Forget a social life - you'll be working to often and too hard, probably away from home, to have any time with friends or family. Even within the company, socialising is not what it used to be - few short haul airlines have night stops anymore.
Stick to the real money job which gives you so much more benefit and perhaps take up part time flying instruction, but don't go back to the airlines - the accountants and overly desperate wannabes have screwed it right up as a profession.