Best:
NRT-Although I rarely drink alcohol, I do like the beer machine. I enjoy filling up 1/4 of the glass with beer. Also, the shower suites are a great break from flying to SIN/BKK.
Worst:
LHR. After spending 1.5 hrs at the LHR Silver Kris club, going to the RCC was depressing. At least, they have internet & sodas so I was able to pass the 30 minutes until flight boarding.
Best little RCC: SNA. The staff were very nice. Flew SNA-LAX-NRT-SIN last year.