You can't re-invent yourself in retirement. You may do some different things but if you were a happy person before retirement chances are good you will be happy in retirement. By the same token, if life just got you down all the time, so will retirement.

I love retirement. I was able to put more time into things I already did, and enjoy them even more. As folks tell ya, I have no idea how I had time to work. There is not enough time in the day to do everything I need to or want to.

Best of luck to you.