This aviation video popped up on my feed and it made me wonder, what do the controllers expect from us?
https://fb.watch/qLNCTi-XQx/
I never heard of the term cold call before watching this video, but I think we're all familiar with the practice of stating for example 'London, Bigjet735 request...' before actually transmitting the request. I agree that it might be a good idea to let a controller know you are about to request a complex re-route, or some other non-standard message, but more often than not, I hear fellow pilots cold calling ATC for level changes, directs, headings deviations and other simple day to day stuff.
What's your view on this, as controllers? Is this just a waste of radio time, or does it help you in any way?