I have been browsing for a wallpaper on Deviantart and ran into this :
http://revolutionized55.deviantart.com/art/BSOD-48406606While it is funny, it still annoys me. Mac users vs PC users, Linux vs Windows, Firefox vs Debian, OS X vs FreeBSD...there is a lot of that "out there". While some of this things are legitimate (such as Firefox vs Debian, there has been quite a discussion behind the rebranding of FFox in Debian), some are just...insane.
Linux vs Windows? I prefer linux, as i understand how it works and what i can 'kill -9'. I still keep Windows around, for my college work and DotA (yep, it works under wine, i know. but it is still more native to Windows, so why wouldn't i play it the way it was meant to be played). Once you get a better understanding of the way linux works, it is actually quite easy to work with.
Mac OS X vs FreeBSD/any BSD? BSD. I simply don't like OS X. Sorry. BSD's are mostly dead simple and well documented. But that's just my opinion, there are a lot of people that like Apple.
For me, it is simple. Go Slackware for a year. Once you know how everything works, what dependancies are all about, switch to something you can easily maintain. I went Ubuntu.
Anyway, it is all about choices. Use whatever you like, as long as you can fix it and understand how it works. If you choose OS X, have phun. At least, it does not require you to have a lot of knowledge about the way it works, it just works. If you like Ubuntu, good for you. After all, it's your computer, your operating system, and you work with it. Just do not say it is better than all others. It is just an OS, not the work of God.