Eventually...here is the complete list of the brands consumed:
1: Mandois Blanc-de-Blanc (Lufthansa First Class Terminal, Frankfurt)
2: Taittinger (Lufthansa First Class Terminal, Frankfurt)
3: Bourgeois (Lufthansa First Class Lounge, Munich)
4: Piper Heidsieck "Rare" (Lufthansa First Class)
5: Dom Pérignon 2002 Vintage (Thai Airways First Class)
6: Möet & Chandon (Thai Airways First Class Lounge, Bangkok)
7: Unknown brand, forgot to write it down, feel free to enlight me (United Airlines Lounge, Tokyo/Narita)
8: Krug Grand Cuvée (All Nippon Airways First Class)
And my favourite...?
Incredibly difficult question to answer, but possibly I would say Krug.