I personally think that in order for you to be attracted to a form of pornography you must be at least a little bit wired that way in the first place, for instance no matter how much porn I watched I never grew a taste for feet, among many other fetishes, so I think it's wrong to assume that by simply quitting PMO you'll never be attracted to that sort of thing again, now more vanilla forms of sex would enter your mind so the craving may lessen a whole lot, however somewhere deep inside you I can guarantee there's a part of you that still likes that stuff, and that's fine, the important thing is that instead of getting your thrills through a computer screen you get them from a real person.
"normal" is very odd these days, many MANY people have far more disturbing sexual tastes than you do, as long as it's safe and consensual I see nothing wrong with it.