I've flown Easyjet without too many problems, have spent the last two years cancelling and rebooking flights with them.
I don't fancy Ryanair, personally I'd rather not go anywhere than fly with them.
There was an incident on Jet2 airlines on a flight to Turkey that was highlighted in the Mailonline the other day, some awful woman shouting and abusing staff and other passengers, drunk of course! Unscheduled stop in Austria I believe to offload her, that of course costs the airline extra money in landing charges. I believe she was fined £5,000. Of course such people can be on any flight, I remember a sweary drunk man on a Singapore Airlines flight coming back from Australia who was off loaded in a scheduled stop in India. Flying a bloody nightmare at the best of times!