What is your favorite alternative voting system? (Poll #2)

[Notes: • If you vote in one poll in this thread please vote in all of them • For a real world example of what I mean by "Multiround runoff" consider the French system]

What is your favorite alternative voting system? (Poll #3)

("Instant Runoff Voting" is when you rank your choices and a multiround runoff is simulated by bumping off candidates one by one and redistributing their votes. "Approval voting" is when you get checkboxes by each candidate and can select more than one; whoever gets the most "approvals" wins.)