Boing - bet you wish you had never asked the question!
I used to think that among aircrew the "no such thing as a silly question" adage would have cut you some slack but clearly you've ruffled some feathers!
You'll get your share of time off the same as everyone else - you may have to accept that initially you'll be at the back of a queue but hopefully that seems logical?
I'm hoping to start with a company in the Autumn and will not be banking on cooking Xmas dinner this year for the wife despite having had the last 2 festive seasons messed about.
It's a life style choice mate but how much you can influence your shifts can only get better the longer you stick at it. Pretty straightforward really and not something I would recommend sounding off about during your first week (or year for that matter) with a company.