I had to restore Snow Leopard from Mavericks - should I upgrade to Mountain Lion?

Hi,
I installed Mavericks from Snow Leopard and it corrupted my computer (MacBook Pro 2011).  I restored the backup and I don't want to try Mavericks again. 
I have a copy of Mountain Lion that I never installed.
Should I install Mountain Lion or should I leave it as is? My computer is perfect and never even crashed until I installed Mavericks. The only reason I would like to upgrade is to run a few apps that are not compatible with Snow Leopard, e.g. PDF Pen, Gemini, Day One... (nice but not essential).
I'd be grateful for any advice.
Thanks,
Rachel

A couple of things to consider:
First, do you use any programs which are PowerPC only (they'd be pretty old)? Snow Leopard was the last Mac OS X system that supported that software on Intel based Macs.
Second, as Mac operating systems get further and further away from the current OS, Apple stops supporting them and that would include security updates. Indeed, two weeks ago, Apple released Security Updates for Lion and Mountain Lion but Snow Leopard was not on the list.
I think the best solution, if you have the room, is what Eric Root suggested: having two partitions with one for each OS. Clone the 10.6 partition and then upgrade it to 10.8 so you have all your software already installed.

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