Good idea to start a new thread rather than hijacking the other one, I was thinking the same.

Here are some of my favourites, I prefer not to rank them though.

*Air New Zealand lounge, Sydney (just great!)
*SAS Scandinavian lounge, Copenhagen
*Lufthansa Senator lounge, Hamburg (nice outdoor terrace)
*Singapore Airlines lounge, London/Heathrow (great staff, great food and free-flowing champagne)
*Thai Airways lounge, Hong Kong
*Lufthansa Schengen Senator lounge, Munich (when it's not too crowded)
*Air New Zealand lounge, Auckland
*SAS lounge, Gothenburg (I actually find it really cosy)
*Thai Airways lounge, Singapore