Hmm Airlines
Intra European: Used to be bmi but now I'd say VLM or Crossair (sorry Swiss)
Atlantic : VS no contest
Mid and Far East : M-rats worth the change in DXB
US Domestic: SW
Airports
Europe: LCY, MUC and OSL (just for being such a beautiful building)
Mid East: DXB
Far East: SIN
US: MCO (by miles) but a distant 2nd is IAH