Ah that's an easy question to answer...
Short haul, Europe destinations, just a few sectors per month, nice sensible aircraft, good crew, good pax, good hotac and most importantly a company that has empathy. Then the job can be a delight. Or... flat out east, west, west again, east, east again, with only min rest between which ends up as 2 hrs sleep, truly awful crew (actually the worst pilots I have ever seen) arrogant pax, dreadful destinations with all sorts of diseases to get you, and they did, and a horrendous management company that extends every duty by 50% and doesn't even pay for it.
You decide?