My favorites:
- 'Snowbird' (haven't seen them for a while)
- 'Beauty' (TUI Belgium)
- 'Speedbird'
- 'Cedar Jet' (Middle East Airlines)
Best ground station:
'Love Tower' (Dallas Love Field - check this lovely homepage:
http://www.dallas-lovefield.com )
Worst callsigns:
- 'Fraction' - reminds me of friction, new c/s of NetJets Europe (formerly known as Skyshare)
- 'Skyrunner' - German operator of a pretty slow bizjet, Skywalker would fit them better.