Hello, I plan to make Linux my secondary OS, but keep it 'portable', while at the same time keep my settings, browser and files on it. Just find yourself some good open-source replacements for the Windows stuff that you kept all your life for the sake of not leaving your comfort zone. Linux Mint is perfect if you consider having Linux as a secondary OS or switch from Windows. It feels more 'complete' and 'at home' like this. Persistent Live is good too, but for daily use it's just slightly better to use the full install.
It's easier than all tutorials in the internet tell you. EDIT: Check reply #14, there I explain it: I went for the full install.