Agree on the NCE comment above, too much linen.
Along with NCE, a similar flight for the DYKWIA crowd is BRU, or even AMS. BRU especially at peak times on Mondays and Fridays.
Anything like PMI, IBZ, ALC, CFU etc can be messy, and rough and not nice at all.
I quite like flights like ARN, ZRH, CPH, MUC, etc. where it's all commuters, but not the pious kind, which makes for a nice relaxed service. Never been much for Long-Haul, but out of all of them I'd say BOS is by far my favourite. Usually a nice crowd on it, especially on the expensive side of the curtain!