I agree with Mixos that I prefer easyJet but really, for me, there is little choice. My son and family live in Henley-on-Thames so I tend to use easyJet to Gatwick as both the better airline and the most convenient airport. For the last four years, however, we have all been going to the south of France in late spring/early summer. The flights to/from Bergerac are from Stansted so I have used Ryanair from Chania to Stansted. Obviously there are routes in the world where there are several options to choose from but I never seem to be flying those routes. For most routes, once you have decided your starting and ending points there is little choice of carrier. I think O'Leary knows that so he doesn't really care if he upsets some of his customers.
For example, he has a legal obligation to inform customers whose flights are cancelled about their rights to compensation. He studiously avoids dong that directly. Instead he offers customers a choice of a refund or a rearranged flights as though he was doing them a favour when in reality that is also a legal obligation. He then states:
We understand that flight cancellations may cause distress and we will accommodate your option of choice wherever possible, while complying with EU Regulation 261/2004.
I don't know what anybody else thinks but that statement is phrased as though EU Regulation 261/2004 is limiting what he can do in some way. It is actually the regulation that defines the compensation due so he can always claim that he has informed his customers. He's a devious ....