well i think in most of the cases the main concern is the money you get for the amount of time you invested to make it!, next, the schedulle, subs'ly the off day's you get to enjoy the nice place, that's very important
a lot of people I know fly like a homming bird in jetair! in deccan is almost the opp, and so on
next will come the benefits, like insurance, loss of licence, tickets for the family, the milkman, blablabla
and the last, but not at all, is your capability, chances or luck to upgrade in equipment, or to jump to the left seat!!!!
c ya