Wow...such a difficult question. There are so many beautiful busty models and actresses that I so adore. I usually prefer the silicone-enhanced models, but every now and then I'll find a natural that turns me on. But, as much as I hate to admit it, the "fake", bulbous, perfectly-round look really gets me charged.
Let me attempt to tackle this one...
SLIM and BUSTY
Adara Michaels
Briana Banks
Jenna Jameson
Petra Verkaik
Veronica Zemanova
ULTRA-BUSTY
Barbie Griffin
Danielle Derek
Denise Milani
Dixie Bubbles
Katie "Jordan" Price
SUPER-STACKED
Donita Dunes
Minka (although I prefer her look before her last boob job which was, to me, going too far)
Pandora Peaks - one of the hottest women ever
Rocki Roads - her breasts are friggin' amazing
SaRenna Lee - my all-time fave...but only when she was at the height of her super-slim and extremely busty look
Summer Cummings - LOVE the look of her perfectly-round and bursting knockers
Tiffany Towers - when she was ultra-busty
Wendy Whoppers - kind of a ditz in her vids...but her tits drive me wild
Xxena - I hate to say it...but her stretch-marked honkers get me off
