Tory Lane does not strike me, personally, as "older", although I'd enjoy seeing her as a submissive. Marie Luv does not strike me as being particularly "younger" (I see her more as in-between), but it would be fun to watch her as a dominant.
Although Jenna Haze is a great performer, I don't think I'd find her convincing as a dominatrix. She did a light, fun dom scene with Tom Byron that showed up as a bonus in her directorial debut, "Cum-Spoiled Sluts", but she doesn't seem to have the edge required to pull off something more authentic and viscerally believable. I'd rather see her as a sub. She looks great with a dog collar.
I'm with you all the way on Sasha Grey, although I'd much rather see her dom someone like Adriana Nichole, who's really into the scene.
Each to his or her own taste, of course.
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