Agree about CDG T2B. Quite an odd configuration with airside check-in which makes it rather difficult to fight your way past check in queues to make your way around the aiport concessions.
Of the London Airports LGW is in my opinion the best. LHR is a pain, last journey into LHR from CPH took 1+3/4hrs then another 2hrs to get off the airport.
Man is awful and so poorly signposted.
BHX is probably my favourite influenced not least by an amazing total time taken of 15 minutes from stand > baggage reclaim > multi-storey car park > M42 Motorway last Saturday.