My two most recent SBs are solid 9s on looks, even better on performance. They are both slender, lovely girls in their early 20s, both have actually done some modeling, and both seem very happy with a gift per visit of $200. Yeah, I'm a lucky old fart!
... when she's sucking your dick. :p
Seriously, I stay away from the implications that arise from these discussions. In my mind it's just not a linear discussion that:
1. Better looks requires/deservers more allowance.
2. Better looks equals less skill BCD
3. Less attractive equals better skills BCD
To be fair, I just won't agree to more than my set BCD/PPM budget (between $250 and $400) for allowance - no matter how hot she is, with the only exception being A-List or B-List porn stars (I have 2 right now) who used to (or still do) escort at rates in the $1,500 to $2,500/hour range. And even then, my budget for porn stars is around $600-$800, mostly because I generally only see them once every other month or less.
So using an absolute budget filter may mean I don't really count 10's who "demand" $800+ PPM, and my personal results are skewed. But I'd say 60% of my SB's are at least 8's to 10's. The lower 40% are 7's. I just can't even start with a POT who doesn't make me hard when I look at her pics, so the "chubby but cute" and the "butter face" POT's are non starters for me.
All of my SB's are great in bed. I recently posted about an Asian/French SB, who is definitely a 10, that I let go. Her allowance was $350, and her BCD skills were off the charts. But there were other reasons that made me need to end the arrangement. Perhaps living in a high-volume POT area gives me more opportunity to find the "gems." If you start with over 10,000 active profiles in a 25 mile radius, finding 5-8 that will fit all your criteria could be just a matter of sorting through more profiles to get what you want. While those living in "pussy Siberia" may need to select from a much smaller sample and so might end up needing to adjust their criteria to get to BCD.
Life is good
The Cat 
Right at the top of my criteria regards companionship (whether SB or pro) is am I aroused by her visuals. Of the SB I've been face to face with, all but one were at least 8 in looks to me in their photos, and subsequently in person. An 8 in looks to me is the sweet spot. I'll admit to being more attracted to the imperfect over the perfect. What stimuli elicits sensory and behavioral reactions in each individual will vary and as such, looks ratings will always be subjective.
