Funny enough, I was actually searching for a ToDo app 'that-does all' one more time after fixing on one three months ago. The issue I generally see with Todo lists are that they are one part of a very nuanced workflow. For eg. I often get worked up choose between a ToDo app or a Note app when I still working on the details. Currently settled on Trello for a multi-modal workflow of saving links, notes, keeping lists of tasks classified by stages is feeling good. But I miss a good mobile app, markdown support and easy creation and maintenance. Any suggestions?!
I honestly use Wunderlist because I just need something bare bones simple. Trello might honestly be your best option if you are looking to do stuff like custom values etc.