I think spending some extra money on the interior and make it look really cozy would be good. In the end these days shopping has changed, it's now more about having an experience, otherwise you might as well buy it online. Having said this I think it's important to work on all the senses. Smell, taste, sight
We haven't fully settled on design yet (let's be honest, it's a few years in the future), but we really like the feeling of exposed wood and the edison-style lights (with the exposed filament). We want it to be warm and welcoming, as if you were coming home to your favourite room in your house. I think the smell would be challenging because books and other paper items would absorb odours, so we have to be careful. It would be great to have a wood-fired oven for pizzas and to be able to do fresh sandwiches as well as coffee, but that's not up to me!
@mwoodall Well, keep in mind that we have played with the idea of a multi-level as well. Opening up a second floor or a roof top patio with plants and so forth, which would offer an oasis of smells without confining them to the book area :)