I would recommend you do a litttle experiment, the next time you have any time off, sleep 8 am till 2 pm and do that several days a week and see how you feel, this job is tough, I have done it for 16 yrs here at ups and the only real downside is that you never feel right even on your days off, all the benefits, retirement and salary aside, this will be what affects you the most, and even at 30% on my fleet it hasn't changed, so understand before you come here, you will fly nights! The day trips are harder than the night trips and just as fatiguing, if the benefits for you run family are worth it then do it, otherwise go to a pax carrier.