Love the wallpapers.
The path with a heart is the path of strong feelings and emotion. It's the path of passion. It's the path that scares you a bit. It's the path that practically makes you want to belt out a warcry to get yourself in motion.
For example, one of my heart paths is public speaking. Going that route stirs a lot of emotion in me -- When I imagine myself speaking in front of people, I always feel something. I never feel indifferent about it.