As I get older, I find my preference is still women under 35. I thought my view would change, but it hasn't, other than the one time I fantasized about fucking Martha Stewart.  
It's like I'm holding onto my college years and want to prolong the fantasy.

Personally, I consider women twenty years YOUNGER than me "old"

... what you consider "senior" and who the woman is. Let's say for sake of discussion senior is 55+.  (A lot of businesses use that age for Senior discounts.).  I find seniors such as Christie Brinkley, Sharon Stone, Kim Basinger, and Michelle Pfeiffer very sexually attractive.  But there's seniors, and women of all ages, whom I don't find attractive.  

I have several out of town "matures" that you could say we're on my "would love to but it's gonna be tough to see" bucket list.  

At 51, my preference is for mature women over the age of 40, who seem to be hitting their sweet spot of body comfort and sexual exploration (talking about providers in particular here, not housewives no longer interested in sex). I can't speak of the 20-something crowd because I don't partake. I just feel more at ease with a mature woman, I like wisdom and experience and feel like I can give it back as well. As I get older, I just have to hope that providers stay in the biz so there will be someone for me to see LOL. Forget Martha Stewart though...give me Jewel or Patricia Pleases!

Raquel Welch. Age: 75

For most of my adult life, the age-range of women I find attractive, especially in a sexual sense, includes but is not limited to ten to fifteen years older than I am. Nowadays that translates to her late sixties or early seventies. If a woman has not "completely let herself go" and is interested in having kinky, wild sex, I don't hesitate based on her being elderly. In fact, if such women exist, I want them!

I will see them up to 5 years younger than I am. So, as I am 70, I will see 65 year old women.

Depends on the woman.  If she takes care of herself, especially her hair I can be attracted to them.  Now if you are talking about providers, I'm probably not forking out money for sex with a 50 or 60 something.  Even though I think I once did in the past.  She didn't list her age, and she had a routine ( I guess it would be called "edging") where she put a light blindfold on you and worked her way around your body and you were not allowed to cum until the finale.  It was different, fun sort of thing.  I wasn't disappointed but I did peek once and well, that bod wasn't close to 20 that's for sure.  

I'm closing in on 70, and it seems for the past 10 years or so, women my age seem to be too old for my taste.   I prefer a woman in the forty to fifty something range.  It probably has something to with all the lovely young women who are available here.

On Topic: Cher at 75! I would like to be her for a day, or a Lifetime...

I guess I’ll be the youngster on this post being only 61yo….

attitude in a youthful body. I have a couple of favorites that I see fairly regularly. Both are in their 40s and about 20 years younger than me. Give or take 3 years. Young beautiful skin and soft long hair gets my motor running but I do appreciate someone who (as that one comedian said) can recognize the signs of a stroke or talk about current events without using a bunch of slang that they picked up from texting or twitter posts. I do text but you can usually tell if the person on the other end is above a certain threshold in age. They will be the ones who write out the entire words and use punctuation in the messages.