Ya, those would be the ones you set loose before you go to bed and _hopefully_ will be done by the morning :) That being said, another thing I like about gentoo is how easy it is to be on the bleeding edge of certain packages, I run the latest -rc kernel (released each sunday usually) and mesa drivers. However I have to admit, even though gaming on linux is as good as it has ever been, I do the vast majority of gaming in windows still because I just don't want to deal with weird issues in my limited gaming time.