ScubaSteve
Wow.....what a DB
For me, having the "Hero Image" as a carrot, helps me keep working on improving my skills, knowledge etc. As long as I realize it is a carrot and not something I will ever achieve in the real world - nor does it have to be , it (mostly) won't kill the fun I have with diving.
This way may work for you. I think it is also acceptable if you set that carrot as a level to which you CAN achieve so that you can feel a sense of accomplishment when you get there. Once achieved, you set the bar higher and work towards achieving the new goal. I think most people would eventually want to achieve their goals....maybe that is just me.