In short, if you haven't flown wide-body/heavy, & fancy a bit of Long Haul, 744.
If being awake at funny times of the day, unable to figure out what day it is, never mind what time of day it is, never mind which part of the world your hotel is located in, "doesn't "do it for you, Airbus family is a good guarantee of a future job opportunity. And, if you change your mind about the insomnia stuff later
, a 330 conversion is fairly short.