I'd say pastel, because they're the most affordable pretty morph... you can get a het or maybe a yellowbelly for around the same price, but they just don't have the "wow factor" of a nice looking pastel.

My first morph (second BP) was a pastel, who I got for $125 at the Cow Palace Expo in May - wasn't planning to even get a snake, let alone a morph, but who could resist a beautiful boy for only $125?! Don't regret it one BIT, since he's still my favorite snake even after getting 5 more.