I'm not the OP, but my (new) MBP crashes twice a month when surfing or coding (Sublime, Typescript, Node).

It crashes daily if I use Parallels and regularly when using Spotify.

That's not normal at all. Try and run a hardware diagnostic test, or try and see if you can find the logs in Console.app

That's highly unusual. You should ask yourself what peripherals/kernel extensions/weird software you have installed that maybe contributing to this. And I would definitely bring it in to Apple for service if the answer is "none."

I would take it back.

My previous MBP went ~2 years of very heavy use without a single crash, and my 2012 MBA has only crashed once, right after I installed google hangout stuff.

For what it's worth, I've seen Sublime mentioned in relation to crashes a couple times now.

That does not excuse it. A text editor should not take down an OS.

That's just because people here are using it 8 hours a day.

anything show up in

kextstat | grep -iv apple

These days I use VMWare, but I've got co-workers with Parallels installed and all day everyday they have random kernel panics and crashes. Uninstall Parallels and most likely all of that stuff will go away...

I had an issue similar to this that was related to a hardware problem with the GPU. I took it into the apple store and they ended up replacing the logic board.

I don't ever remember the last time my MB Air crashed. I run Mavericks (10.9.5) + Windows 7 (parallels)

edit: Mid 2012 Air, 2GHz i7, 8GB ram