Mamading Ceesay I recommend the experience. I enjoy the Sheffield cons for this (and I’m now unbiased since I handed over the one I organised 😉 ). Dragonmeet (I seem to recall you’re London-based?) was good last year for two hour indie games on demand, and less commitment, though in general that’s of course something very much at the other end of the scale in terms of numbers, with tens of thousands of people…

And a big YES to gutting established protagonists!