What makes a tournament series great to you?

Soliciting feedback here.

I'm stepping into a TD role and I'd like to hear directly from the poker community on what some of the most important things are to them when it comes to choosing a tournament series over another.

I have a few ideas how I'd answer this question, but I'd like to hear from you because frankly my view isn't the most important, it's that of the players.

Let me have 'em!