Windows 7. Why? Because ...
Because you are afraid to step outside your comfort zone and actually learn new things?
You little synopsis of "what is wrong about the computing world (outside of MS)" is highly:
a) inaccurate
b) hypocritical
Accusing a free OS of not being free because it includes an inalienable right that derivatives also be free is stupid. The license isn't perfect, but your argument is pointless because:
a) you are arguing "freeness" while using a completely proprietary platform (WTF??),
b) It is well within you right to close your project if it runs ON linux, as long as it is not PART OF linux (and FYI, that is the Kernel, nothing more). It's called having your cake and eating it too. That's how us smelly-basement-dwellers-who-really-need-to-shave make our money.
You argument against OSX is conflicted. Here's my summary:
"OSX users, your OS is not more secure... but no one gives a ****, so until they do, your OS WILL be more secure."
Ok, so what is the issue? The lack of exploits for a given OS IS a selling point. Should that change in the future, then it would no longer BE a selling point. This is not rocket science.
an example:
Tiny Tim and Richy Rich both hang out on the playground at recess, and there happens to be a lot of bullies on this playground.
Both kids are huge pussies, and are easy targets for the bullies. However, the bullies only care about money (market share) and they find out that Richy Rich is aptly named, so they pick on him exclusively.
Tiny Tim is sitting there keeping his 2 cents to himself, knowing they could easily take his **** too, and the only thing stopping them is that they are happy to plunder Richy's Riches day in and day out. Should Tiny Tim acquire such a fortune himself, he might also become the target, but until then, does he care? Nope, as long as he's not getting his ass kicked every single day by the mean bullies.
Which one would you rather be?
And furthermore, nobody really gives a **** anyway. Any computer you're going to buy nowadays has an operating system installed, and it isn't Linux.
Yes, people do give a ****.
As for computers coming with an OS, well, most of mine don't (because I build them myself), and I do care, so I put linux on them. Some netbooks come with linux on them, and a WHOLE load of smartphones are using "linux".
Kinda defeats the point of being "free"
Maybe you don't understand the "point of being free". I can assure you that it is not to spend you days lamenting the use of one free license over the other to the point of never actually using anything...