Honestly, this book moved throughout castes in my mind as it proceeded. At first, I hated it. Immensely. His opinions on animal captivity were awful. In fact, he contradicts himself. He compares zoo-life to a hotel room with complete room service, and wild-life to homelessness. Fist of all, no, and second of all, personally, I'd be for homelessness. At least then I wouldn't be trapped in the same place for the rest of my life. But that's not where he contradicts himself. He later says this: "Why do people move? Because they are restless." 
 Alrighty then. Animals are never restless, right? 
 And then he pretty much calls Catholics irreligious. I know a Roman Catholic, and a Protestant Catholic, and they know the bible by heart. One of them carries it around with him. How are they not religious? 
 Then, it takes a little step up in the caste system of my mind. From merely a filthy peasant to merchant class. He talks about taking the faith of three different religions. I admire his devotion. 
 And later, it reaches something of a middle-class citizen when he gets stuck with a tiger in a lifeboat and all that. It was good, it entertained me. 
 Then, it reached nobility when they found the island of seaweed. That was... Frightening, if I'm honest, 'totally awesome' if I'm not. 
 The end was also rather entertaining. The 'more realistic' ending was interesting, and I enjoyed the conversation between Pi, Okamoto, and Chiba afterwards. 
 Maybe later, when I have more time, I'll use the ages old Japanese caste system to organize things. I could probably say things a little more accurately there. 
 All in all, not a bad book. The story itself was interesting, while his opinions were not as... acceptable... in my opinion, at least the major chunk of the story was entertaining. 
 3.5 stars; I had to take off 1.5 because of the anger it caused me during the first 50 pages or so.