The reality is, you have no idea whether something will be your dream job or not until you’re working there. Until you’ve been working there for a while, in fact.
I’d even go so far as to say that there’s no such thing as a dream job that you can truly recognize from the outside. Because as much as you think you might love doing that work for that company, it might turn out that the boss is a nightmare, or your coworkers are horrible, or the company makes you sign out for bathroom breaks and bring in a doctor’s note every time you have a cold, or you’re abused daily by clients, or your workload is so unreasonably high that you end up having panic attacks every morning.
Dream jobs do exist — when it’s work you love, at a company that treats employees well, working for a great manager, alongside coworkers who are competent and kind, or at least unobjectionable — but it’s dangerous to think something is your dream job before you’re really in a position to know. It can lead you to turn a blind eye to warning signs or to make decisions you wouldn’t make if you had all the facts.
— askamanager’s advice piece on the value of pursuing “Dream Jobs”. It will also be helpful to read the comments section for a lot of other people’s experiences with their “dream jobs”. Seriously man, in an age where people seen to be obsessed with getting their “dream jobs”, some reality check on the whole concept is needed.