During flea season, I use dawn dish soap a lot, since it kills flea's.
I use a lot of Tropi-Clean's products. I find they smell great, and leave coats shiny and soft. For Jake, who has a lot of allergies and dander, I use the Oxy-Med made by Tropi-Clean, I use both the shampoo and the oatmeal medicated conditioner. I love it!
I also use a lot of Kenic brand products, which are all natural. I use their conditioning protein shampoo, which I love. It makes my guy's coats smell so great, and their hair is so soft. I also use their Emu oil spray, which gives them a great smell, and shiny coats.
I used to use Earth Bath, because it smells great and is all natural. But like Laurelin, I noticed that smell didn't last at all, and some of my guys were smelling later on that same day. I also found that it didn't seem to clean them as well, some of them still felt kinda dirty, and their coats weren't as shiny as other shampoo's.
So, I really recommend the Tropi-Clean line and the Kenic line as well.