After my graduation as mechanical engineer, I worked just for just a few months on in a company. I was in charge of the maintenance of a kind type of washing machines; Honestly, I didn't enjoy that job, you're always busy, stressed, sad, and tired. 

Can you believe I had only ONE free Sunday per month? This is not the job that I imagined for myself, and thus is not the job to do all for me for the rest of my life.
I quit six months later and immediately I felt relief, all of my family was worried about the money because, I quit without any other employment to take proximately it's place(?) but for me it was fine. I'm one of those people that think you need to feel comfortable with your life, with the things that you do to “survive”.

I changed completely my job completely. Let me explain myself. Before my graduation, I became a firefighter, I was volunteer but for me was like a full time job, I really enjoyed the possibility of helping others, the adrenaline running through your veins and the uncertainty about what kind of emergencies are you going to deal with.

I totally agree Camilo, if you have the chance, do what you love. You probably spend more time at work than at home! So it's important to be happy and fulfilled. Nice stuff.