I prefer women that are mature and highly intelligent, likely in the mid-30's to late 40's
My experience with women under 25 has generally been poor (with a couple of amazing exceptions who were wise beyond their years ). Therefore, I will usually do a ton of due diligence now on anyone under 30 before taking the plunge. Most often i do not.
Sorry to generalize but, to me, it increasingly seems that under 25 there is a strong correlation between being very pretty and being a disappointing SP (likely because they are too self-aborbed, entitled and fawned on their whole life to be client-centred).
These young women might make good fashion models, but they likely make terrible SP's. (in my opinion...unless you're attracted to plastic dolls).
Older women are more experienced, have lived their lives, have likely faced challenges, and therefore i find them more appealing and interesting. That life experience makes them more opinionated, more intuitive, better able to adapt to what their client is thinking/wanting/needing. Younger girls don't seem to have a clue.
Moreover, given how health conscious ladies in this business seem to be now, most of the mature women I've met in the 35-50 range stay in great shape, look amazing, are youthful, sexy and (likely a reason why they are still SP's) they love sex and it shows). For example, Catherine James is an amazing SP. Beautiful, smart, sexy, intuitive but very athletic, health-conscious and in great shape. She puts 20-year olds to shame....and likely will for many years to come.
Give me that over some pampered teenager who's been worshipped all her life for being pretty, but doesn't have a thought in her head...yet. (with no disrespect meant to Celina Rai or Scarlette Rose - you girls are incredible and the exception that proves the rule)