For G3, Minty esp Winter Minty, the fair/comic-con exclusives, Snowflake, Pepperberry, Autumn Skye, Daisy Paisley, the Birthflowers esp Feb., several of the babies like Winter Ice, and many more that I can't think of now.
I can't say for the G2's, and none of the G3.5's are not very popular, except maybe some of the Moms.