OK, first and foremost I must say I have a preference for southeast asia girls in terms of attractiveness. I can't fully explain it, but there is just something about them. Some may say lbfm but its not even that. So southeast Asia and Chinese girl looks wise usually appeal to.
Now with this out of the way, comparisons between providers. Now, please note this is a small sample size with a pasty white guys view and some generalizations that might be off. So it's a limited viewpoint and I hope no one gets offended.
Chinese girls imo are the most open about money. A lot don't hide that it's the most important thing to them. On one hand, it's good that they're being honest. On other, it can cause a very mechanical and boring session. A lot of Chinese girl keep the pussy natural which I like actually. Then I'm not a big daty guy. After most providers having bald pussy, a Chinese pussy with a bush is a very nice change. Chinese girls are the biggest actresses in the field imo. Many of them are vying for an Oscar during sex. I'll admit sometimes it can work, but most of the time it's just annoying because they really want you to finish asap.
Koreans. Well, out of mid-aged girls they give best overall service. They generally have best hygiene (again, no offense to anyone, just my comparison). Korean providers get a LOT of plastic work done on their body and especially face. Koreans are biggest troopers out there and can take these crazy volumes via their discipline and drive.
Thai. Thais treat sex very casually, and if you've visited Thailand you know why. Many of them won't go out of their way to deliver iop of you're looking for that. Thai girls here and Thai girls in Thailand are a bit different. Americanized Thai girls who aren't providers can be very very fun sex-wise and open to a lot of things. Thai girls are generally very outgoing and social and I'd say the sense of attachment to their families is less so than with other girls.
Viets. I've only been with older viet girls, but yeah most of them can FUCK. Some are BSC. Some are catty. Since I've never been with a viet girl outside of hobby, I can't say much more. All viet girls I've even with were service oriented and made sure to squeeze as much as possible from me.
Filipinas. Probably my weakness. Growing up around Chinese and Filipina communities I've dated a few Chinese and Filipina girls. Filipina girls are plump very teasy. That's americanized ones. Fob ones and one in Angeles city are enamored with western culture and they definitely are the most to just do whatever you want, I mean sex-wise. Maybe not as active as viets, but I think their body/skin/pussy combination is great. As providers tho, they're behind viets and Koreans service wise.
Finally. Bleach. I hate bleached makeup look on a darker girl and I understand some girls like that look, but last thing I like is the michael Jackson look. Some kgirls and Thai girls are guilty of that. You're beautiful with that darker skin, girls! Then again, I'm pro natural all the way lol.