It's simple really:
Choose the most irrational conversion from an experience, preference or current fleet perspective...
That's what you'll get.
Expressing an interest in any particular type guarantees it's exclusion.
Want "le grande plastique" to visit dear old mum in YSSY? Faggetaboudit. 777 for you.
B744 to get those YVR flights to polish off your float rating? Bus for you my boy.
Get the idea?