Had to give my 5 cents to this topic.
Mature favorites:
1) Yuuki (Yuki) Tsukamoto つかもと友希, also known as Chiyuki Makimoto 牧本千幸 (まきもとちゆき)
2) Juri Yamaguchi 山口珠理(やまぐちしゅり)
The first adjective I think about Yuuki, is: cute. And I don't really need any more adjectives, that makes her my favorite mature. It's a summ of both appearance and character. Cuteness beats every other property of a woman!
Juri has just an amazing body and a GORGEOUS RACK! I've only seen 2 of her movies, the first one was JUC-078 and boy I was sold after that! She appears so tender and vulnerable you gotta love her face.
"Hoping for mature come back" favorites:
1) Shiori Fujitani 藤谷しおり
2) Maria Takagi 高樹マリア
Shiori is one amazingly enthusiastic and horny actress! No matter what kind of figures she'd have, I'd rank her very high also for that reason only. But she also has the MOST PERFECT SET OF BOOBIES I ever saw!
Shiori maybe wouldn't quite reach the "mature" genre with the videos she made. Her most "recent" movie I've seen she made 29 years old 2003 (most sites list her last movie been 2001, 27 yo). This December she would be 37 years, and I'm so hoping for her come back! She was drop dead gorgeous when she retired, I'm sure she still is.
Maria, ah, she is so big main stream celebrity I hear, there's not much hope for her come back. She is so cute I can't help being so attracted to her. Can hardly watch her doing AV, and hate every guys she is with! Argh, being jelous of an AV-actress, that's stupid! But when someone is as lovely as she... what can you do? (sigh).
Hoping she continues to mature age and makes a million movies:
1) Yuka (Yuuka) Osawa (Ohsawa, Oosawa) 大沢佑香 alias Akira Elly.
Horny, cute, and a huge squirter. A combination hard to surpass! She is alone in the top for me! Oh, well. Togther with Rio Hamasaki.