I'm personally inclined to go challenge-prompt fest style again, electing 3 common prompts.

But I'm happy to go back to exchange-gift style, if we can loosen our parameters and expectations just a little (given how few of us there are, and how widely our tastes diverge).

I wrote up a model similar-to-HLH sign-up template for us last year: take a look at it? Instead of an "order" from the reader to the writer, it's more like a "menu" from which the writer can assemble a meal...?