I buy every game that's worth buying. That might sound like a bad excuse, but it isn't. Yes, I do pirate a lot, but I buy quite a lot as well. Since I'm pirating, I'm only buying more games.
I have a backup loader for my Wii, a flashcart for my DS and a modchip in my Xbox, but I buy games for all of them. I have 3 original Xbox games and about 100 backups (but hey, I got it a few months ago with a lot of backups on it!), I have 10 original DS-games and pretty much every rom and I have 10 original Wii-games and about 15 backups. In the end, the gaming industry didn't lose anything because I would've bought the same amount of games with modchip/loader/flashcart, just different ones.
I never buy movies or music though. It's actually legal to download music and movies in the Netherlands, so it doesn't really bother me. I do have about 10 original DVDs, but I bought them for a very low price (like 5 euros).