I love the process of starting with lots of disparate, muddy information about a situation and synthesising until I have an insight that brings the situation into focus.
A common saying in the corporate world is “It’s not what you know, but who you know”. Use your time as a grad (and beyond!) to network with people and create your personal brand, you never know when a relationship may prove advantageous.
Some of my most satisfying moments have been after implementing a solution and being able to show the result on the application. Having others use something you have helped build is very rewarding.