Here is one variety, called the Blue Mouse Ear hosta, that I just fell in love with last year. It resprouted this spring vigorously, and bloomed last week:
[image credit Gary]
What I love about this plant is the strong blueish hue coupled with the small, delicate leaves, which are about the size a playing card...cut in half.
I have this one planted in my tiny "moss garden" as it seems to be a perfect fit.