All the software
I'm with the webmasters on this 1000%. It's not that I'm against Linux, its that I can't be for it.
The OS is just impossible because you have to know about a gazillion commands to make it do what you want, and who has time for that?
The apps software that comes with it as open source is distinctly second rate, which explains why it is free, and there is a dearth of specialized software for particular uses. Cross-platform emulators are lame.