I'd say depends on who your customer base is and how you're targeting them...think about what's going to make the first impression on your customer. If you're selling face to face - in markets or whatever - people are going to in all liklihood smell first, then they'll look at your soap's appearance, texture, ingredients, packaging and such as a secondary factor. If you're targeting an online customer base (this is mainly how I sell - and by word of mouth) then I find that overall ingredients become more important - someone might be looking specifically for a milk soap, one made with locally sourced honey, anxious to know about ethically sourced palm oil, that sort of thing.