I buy every album as soon as it's up for preorder. For singles, I rarely buy them, mostly if they are really amazing and have b-sides that won't end up on the album and/or cool bonuses. For concert DVDs, I own just AT08. Even though I love them, I can't afford them normally because they are so expensive. I buy only Japan Version, even though they're the most expensive. Don't really know why, I just love them... haha. And I buy just one version of a release.
