Linux and OSX are more alike than you think.
I'm completely happy with ML on my laptop, however it appeared to me that OP was looking for an alternative OS.
Linux has gotten wicked easy to use - only downside is that you cannot pick a copy off the shelves in box stores.
Either way, to each their own. Everyone has a different opinion on what's the "best" OS.
My opinion - grab some live CD's or create a test partition and test a few different flavors out until you find the one you like. Perhaps you my just stick with OSX.
Yes, I am aware they share a lot, but from what I know Linux used to be have a fairly steep learning curve, like installing apps for instance.
I installed an old distro on my 2012 Mini a while ago, want a newer one but sadly I am on a limited internet connection, capped, so I can't download one or more of the newer ones.
What I don't like about Linux is that the UI is too much Windows alike, don't know if this is still the case with the newer distro's but I certainly don't like many of the older ones.
OS X works out of the box, by far the most stable and usable OS (IMO)
Btw, I can get lots of illegal software here if I want to, but they aren't that cheap anymore, I don't want to pay $5-6 for a free OS (Linux) while I can buy an internet package for the same price and download it.
It seems little ($5-6) but here in Asia that's quite a lot, lots of people don't make much more than a dollar a day!