DryYourEyes, when you got the base preference sheet it should have come with the advice
bid for what you want. This means that if you want to fly the 757/767 out of Gatwick then put that as your number one choice, then put your next choice and so on (presumably leaving Glasgow till last). You will not enhance your chances of getting in by bidding for what you think is an unpopular base, you'll just make your life miserable by being somewhere you didn't want to be!! As for choosing between the 757/767 and the 737 it is a choice between an easy life on a Carribbean beach and working hard for a week at all times at least 200 miles away from your home