Ever since I made second class I began writing my own evals and submitting those along with my brag sheet (a sheet that says basically everything that you did worth while in the past year). When I wrote the eval I would always put in the top two boxes (I forget what number they are) ,above the actual writing, the positions that I wanted. One was "Commissioning Programs" (which later turned to STA-21 after I found out about it), the other would be LPO or what ever the next position of greater responsibility was. They were always there when I got the eval back. With the one exception of my eval just prior to transfer where they put systems school instead of LPO or what ever it was that I had in there.