I can't get enough of Mullet Wax's Awesome Wash n' Wax. I have 14 different washes in stock now, and this is my "reserve" shampoo. Has an absolute ton of suds, smells great, and will actually re-sud itself with agitation, and I'm not talking suds for only 30 seconds either. My other favorites are Adam's Polishes Wash n' Wax and Zymol's Blue Concentrate (easily the best smell).
I have been working with Poorboy on their new shampoo, and all I can tell you is WATCH OUT!! Thus far, it has the best lubrication out of any soap I've used.....which makes me think/feel that when I wash my clients vehicles a month after a full detail, it will be safer and less resistant to scratching.
While smell and color don't seem like big factors....believe me, when it comes to marketing, they are!