On my PFL, I was fixated on a great field on my left side and carried out an acceptable PFL. However, if I'd looked past my instructor out of the right hand window I would have seen an airstrip which would have been the better choice!
Did exactly the same thing on mine! Luckily I spotted it and rejigged my approach. Also on my diversion which was to a disused airfield I didn't know I knew we were somewhere close due to the timing but could I hell spot it. He said 'Well, have you spotted it yet?' Which made me cringe a bit and I told him no. He replied 'No, neither have I, it's a bugger this one isn't it.'