A fresh installation of OS X?

After a couple months of my MacBook Pro being slow as a snail, I've given up on it being "just alright". For all this time I've been experiencing runaway disk usage and slow performance. I think the best option right now, as it always has been on Windows, is to completely reinstall the operating system. This MacBook is my main computer. I use it primarily, and it's full of personal data like family photos, music, etc.

I know I can reinstall Mountain Lion using the recovery feature, but after that's completed how can I reserve the option to only restore my documents and settings? What I'm trying to do is restore my personal data from my Time Machine backup without restoring any problematic apps. I'm starting fresh, but I want to reserve all of my personal data - and bookmarks if I can.

Any help is much appreciated, thank you!