The 'supersize my porn stars' trend is lost on me, as well. There are some 'thicker' stars that I'm into, like Jynx Maze and Yurizan Beltran, but that's more to do with the fact that they're also cute. Overwhelmingly though, the stars I like fall into the cute and petite category, e.g:
The aforementioned Lexi Diamond
Georgia Jones
Isabella Sky
Sammie Rhodes
Shyla Jennings
Nina James
Anetta Keys
Talia Tyler
Lana Violet
Dani Woodward
Ariana Fox
Veronique Vega
Eufrat
Lindsey Meadows
... and I'm always on the look-out for more (provided they're also good performers). I will have to check out this Alison Brie-lookalike, Abia :p

[Link]