The semi-political ones
I got a few people churning out long arguments about whether or not intellectual property is valid, and claiming that it was censorship, or fascism and other variations on this theme. I'm used to reading all this, and find it completely unconvincing, and to be honest, silly. The really interesting news was that this was a trivial proportion of the total replies.
Money
This *did* surprise me. A LOT of people cited the cost of games as a major reason for pirating. Many were kids with no cash and lots of time to play games, but many were not. I got a lot of peoples life stories, and a ton of them were my age. Even those who didn't cite cost as their main reason almost always mentioned it at some stage. A lot of anger was directed at the retail $60 games, and console games. People in Australia were especially annoyed about higher prices there. My games were $19-23, but for a lot of people, it was claimed this was far too high. People talked a lot about impulse buying games if they were much cheaper.
Game Quality
This was a big complaint too. And this also surprised me. I have a very low opinion of most new games, especially triple A ones, but it seems I'm not alone. Although there were many and varied complaints about tech support, game stability, bugs and system requirements, it was interesting to hear so many complaints about actual game design and gameplay. Not a single person said they had felt ripped off by a game due to substandard visuals or lack of content. The consensus was that games got boring too quickly, were too derivative, and had gameplay issues. Demos were widely considered to be too short and unrepresentative of the final product. People suspected that the full game was no better than the demo. Almost everyone had a tale of a game that was bought based on hype which turned out to be disappointing.
DRM
This was expected, but whereas many pirates who debate the issue online are often abusive and aggressive on the topic, most of the DRM complaints were reasonable and well put. People don't like DRM, we knew that, but the extent to which DRM is turning away people who have no other complaints is possibly misunderstood. If you wanted to change ONE thing to get more pirates to buy games, scrapping DRM is it. These gamers are the low hanging fruit of this whole debate.
Digital Distribution
Lots of people claimed to pirate because it was easier than going to shops. Many of them said they pirate everything that's not on Steam. Steam got a pretty universal thumbs up from everyone. I still don't get how buying from steam is any different to buying from me, other than you may already have an account on steam. For the record, I'd love to get my games on steam. I wish it was that easy.
Confessions
I got a few people, maybe 5% of the total, who basically said "I do it because I like free stuff and won't get caught. I'd do the same with anything if I knew I'd get away with it." This is depressing, but thankfully a small minority. I also got the occasional bit of abuse and sarcasm from hardcore pirates who have decided I am their enemy. Who would have thought that would happen? They give the other 99% of pirates a bad name, and are the reason people don't listen to pirates.