It all depends on what you want out of life. I flew for KLM for 5 years, did the whole commuting to and from Holland for free, flew the 737 and had a good job. After a few years though commuting on days off and going through security 5-6 times per day, starting early/finishing late, spending 7-8 days at home a month didn't do it for me anymore. I fly for the big orange now and have to say I really enjoy the flying and also the fact that 4 days off means 4days off and not 2 of them putting my uniform on and sitting in the airport waiting for the plane to arrive. Major carriers get slot delays and have to de-ice as well you know! Glad it's still working for my former friends at KLM and I wish them nothing but the best, it just wasn't for me anymore.