It’s hard to rank your own games, so many ways to rank them. Do you rank them by what they mean to you? By your personal taste? Do you try and be objective in some way and not let your personal bias as to a pet theme get in the way? Do you rate them by your keepers or by the funnest games?
For example, three games I know I will never sell are Doctor Who, Varkon, and Safe Cracker, but they are three of my least played games and I would not rate any of them higher than Tron...but I’d sell Tron way before I sold any of those three.