Casino Ideal Tournament and ideas

Hi guys!
I have a bit odd question: what comes to your mind when you hear "ideal online casino tournament"? I mean there are probably tens of regular or one-time online tournaments everyday I and I would like to know what especially do you like on them, what you dislike, what do you miss or what would you like to see. Feel free to share any ideas and thoughts and don't be afraid to think different and be totally open.
And why I am asking this question? Firstly, it's my personal interest, I have been part of the gambling community for a few months now and I got totally amazed by it and love exploring it. Secondly, we at Oshi might be preparing some kind of innovative lottery and tournaments (I can't tell more for now) and this could be a great place for a inspiration (not only for Oshi of course - anyone can decide to hear out the users and use some ideas)
So let us know!
Cheers,
OshiHugo

PS: I would personally love some kind of themed tournament... what do you think?