Safety
Comfort
Schedule
In that order, or Jets appeared to be lightening magnets, simple change in the OM to say weather avoidance should be 50nm from cells when lightening activity is present.........and have not been struck in years. 50 left or right when enroute is nothing compared to having to hold at CG for the rest of my life trying to get to BNE.
Its funny that when you are fresh you are dieing to get your IR so you can go in straight lines and bust a cloud or two. Now I do everything to avoid pretty much anything i can simply not to spill the drinks.