I do not believe them to be necessarily correlative... but I have found the more I practiced, the more I fell in love with martial arts in its entirety.
I might be unique, but I like to think I'm not.
I enjoy it because of the freedom it allows me. It gives me self-control, and more importantly, confidence, which is something difficult for me to achieve. Mine is rooted in good teachers, and experiences to back their teachings up. I hope others do martial arts out of love for it. I started because I wanted to be like a power ranger, and inadvertently, ended up following in one of their footsteps, and even going farther.
I've found the simplest reasons for starting, can end up with the most profound results. I continue to meditate and train as to why exactly, but I am certain it is also unique to each own.
I think eventually there is a feeling of bliss while practicing. I know on rare occasion I get to truly feel it when sparring, or stretching, or even while doing forms and kata. I have heard martial arts called philosophy of harmony between mind and body. The closer you get to this, the closer you get to that idealized harmony. I can only imagine once achieving it, even if in part, it is a wonderful feeling.
It's not a goal I've had to reach... just something I've found while practicing.