Mr O'Leary is an interesting case when it comes to finding what you love. I would argue, from what I've seen his company do, and from interviews with him that what he <i>loves</i> is to be the maverick.
-To play with the EU bureaucrats i Brussels
-Mock Nicolas Sarkozy with adverts
-Get small cities to actually pay Ryanair to get routes to their airports
-Bypass the unions by having cabin crews from Eastern Europe.
I think O'Leary could have done the same with another industry if he wanted to. Doing what you love doesn't necessarily have to mean that you love the trade, but the feeling and excitement you get from doing it.