For me, the best director is Brad Armstrong from Wicked Pictures.
He directed the best Jenna Jameson's movies like Dreamquest, Flashpoint, Conquest, Wicked Weapon and recently The Craving, Manhunters and Coming Home.
And for sure, the other director whose I love the work is Celeste. She's the only in the industry to make sensual movies like Porcelain, Lascivious Liaisons, Hot Rod for Sinners, and many others...
After, I like Justin Sterling's works like I Dream of Jenna and Paul Thomas for his The Masseuse.
I like Nic Andrews for his Stripped, Rush, No Limits, and Johnatan Morgan for his Sex Massacre and his Space Nuts.
I'm really fond of Michael Ninn because he makes really esthetic movies.
Finally, I love Pirates and Island Fever from Joone, even if in my opinion, we aren't a real director when we realised just 3 or 4 movies.