Where did you buy your protein samples?
Nashua Nutrition, Chike, and Unjury for me.
http://www.nashuanutrition.com/store/protein-powders/
http://www.unjury.com/store/protein/unjury-protein/unjury-st arter-pack.html
I got a sampler pack of 14 brands/varieties from Netrition for $17.99, and a sampler of 12 packs of Syntrax Nectar for $21.95 from the same site. There are a couple in the assorted brand sampler that don't fit my NUT's guidelines (collagen protein in a liquid protein shot, more than ~100 cal/20g protein). Yesterday my husband and I went to a local natural/organic market and they had a treasure trove of single serve protein packs (including Jay Robb) for $1.59-$1.99 a pack.
I got the unjury sample box, bariatric choice sample box, and purchase single servings of shakes from the Vitamin store
http://www.bariatricchoice.com/wonderslim-try-me-assortment- bariatric-samples.html
The previously mentions Nashua Nutrition allows you to buy single serving samples. I was able to find a couple I really like by just buying a bunch of these that I wanted to try. Also Vitamin Shoppe usually has a few samples you can buy for a $1 or $2. Well worth trying it before you commit to a large container. Also when you do try a new type that you haven't tried a sample of I recommend buying the smallest container you can get that flavor it so you don't commit to something that you won't finish.
Here is the link to the single serve samples:
http://www.nashuanutrition.com/store/protein-powders/protein -powder-samples-1-serving.html