@ Hotel Tango
Alright then: Air France. One emergency landing, one cancellation, both long-haul flights, on-the-ground service essentially non-existent in both cases, contradictory re-booking information from call centre (including instructions NOT to board the Air India flight they themselves had re-booked me on), etc.
I've flown more times on Ryanair and for the only major delay the terminal staff were present, poliite and informative (on another occasion I abandoned a short round trip because of a lengthy delay due to fog on the outbound leg but that was my choice).
I know AF doesn't get much love round here but it's my perception that for most European carriers these days, when things go wrong passenger support staff are basically invisible.
My criteria for choosing a carrier are basically: safety certification/record, convenience, connections, cost. I'll fly Ryanair if it's convenient and accept the limits of the service. I'm not more concerned about safety than on other European carriers.