I play fretted electric bass, but mainly upright jazz bass. I started playing fretless electric, but sold the body of the bass I made. Therefore, I have a warmoth fretless neck (quite nice) sitting around. I am 17 and looking to pursue a career in music, hopefully centered around sessions and jazz (I'm attending berklee's 5 week performance program this summer to further my studies). My dilemma is: should I sell the neck and continue playing upright and fretted electric, or buy a new body and study fretless electric also? Also, do you feel that the ability to play fretless bass well makes a bassist more desirable for sessions and gigs and such? Is it worth my time (given my experience on upright and electric) to study fretless electric bass?