Best Characteristic of Sulfate Free Shampoo

I know almost all of you have used a sulfate free shampoo before. Now, there are several characteristics of sulfate free shampoo that surely made an impression to you. For me, there are several characteristics of these shampoo has. One of them is the smell!! I think these shampoo have a great smell. Another to mention is the texture when bathing. Yes, i noticed that every time I wash my hair, the texture of the hair is so good and smooth. And lastly, the last impression i got is the hair after washing. I just love my hair after washing as its so bouncy and smooth. How about you guys? What are your impression of Sulfate free shampoo?