Erica and Jelena are definitely my 2 favorites by a wide margin. After some pondering, I had to give it to Erica -- she's just got it all around. Jelena is a nice throwback to the pinup glamour of years past (which I have a great amount of affection of), but Erica is just the sweetheart that everyone loves.
Jelena shouldn't be favorited for her height. I know the typical 5'7" or 5'10"+ for models is because dresses look more slender on height (for the traditional catalogue), but it's really become an artificial filter that just prevents the most beautiful women in the world from being discovered. Take Danni Ashe for example, only 5'2", yet she's far more popular than Cindy Margolis, who is the typical "minimum" for a model at 5'7".
Now don't get me wrong, I like tall women as much as shorter. I've had a few over 6' and unlike other men (I'm 5'9"), I didn't feel intimidated at all (and loved it!). But when a woman is beautiful, I really can't stand the fact that she can't get a break because she's not at least 5'7".