Ah:those good ole days of 70s and early 80s poontang cinema really have a soft spot in my heart,for I enjoyed watching these on cable TV during my teen years,and still think about the joyful times of enjoying these films(including the brutally rough ones from that time).
Otherwise,as far as current films go,I'll say the early mid 90s Jenna Jameson and Wicked Pictures film,as well as that era's VCA,early Shane's Worlds(when Shane herself actually hosted it),and Vivid films,which were really breaking more important ground(fetish,couples-related storylines)back then,and Mia Smiles wildly getting her feet tickled in the first(and only good)"Head Over Heels" feature(before Alex Sanders left that series,and Odyssey Video went down under soon afterwards).