What if you were the person that replaced you in your current job?
What would you do differently? Is there something that is occupying your time that you would eliminate from your day to day? Is there something that you should be making a priority that you are not making a priority? Is there a relationship you need to build or fix that you are not attending to - or other relationships that you need to let go of? Is there a new idea or project that you really want to get off the ground but have not been able to operationalize? Is there something that is definitely not working in what you are doing now but you have not been attending to?
All of this begs the question - if you know things that need to change and you ARE in the job currently, why aren't you taking action NOW?
If you had a successor, I suspect you would want that to be a different (better?) version of you. But you don't have to wait for a successor to be different (or better). You have the power to steer a course towards change now, and take the action needed to get there. Perhaps if you take some time to reflect on what your successor should or would do, you can start to steer that course sooner, and take action faster.