I ADORE my shrimp!
I have one Bamboo/Flower shrimp in my 38 and one in my 20L, six Amano shrimp in my 38, and Red Cherry Shrimp in my 20L and in my Eclipse System 6. They are FUN, and have a surprising amount of personality.
My Amano shrimp have all grown a bit, but one is now nearly 2 inches...