Congratulations - doing this in economy is incredibly impressive, I really take my hat off to you. I had one year attempting to retain silver all in economy and even with a few long hauls it was extremely hard work.

Gold is fun - you'll enjoy swishing in through the gold wing (I certainly do), and GF is a step above GC even if it's not exactly unalloyed luxury. T3 is a great experience too. Don't listen to the cynics basically. Mind you if you gave up smoking you could probably afford the odd trip in F