Any Swedish bizjet... SE*** never rolls off this toungue nicely!
Oh, and any callsign with 'Airline(s)' in it, like RGA. How fr*gging pointless is that! Of course it's a bleeding airline, couldn't they have come up with something more original???!!!
And this one, from the sim...
Me: Trans-echek-you-tiv *** blah blah blah...
TEJ***: blah blah blah, TEJ ***
Instructor: No, no, no... it's Trans-ehek-utee-bvos
Me: Oh, ok.. Trans-eeeeehek-eee-teee... no, hang on... Trans.. oh b****!!!
After about 5 mins, I got the hang of it!