First off - individuality is of paramount importance, and personal preferences make the most difference. There are no hard-and-fast rules.
I was a goody-two-shoes for a long time. I married young & divorced young. After my divorce I was heartbroken and I went several years without intimate company. One day after about 2 years with no sex, I kind of went bonkers and spent several years "sewing my wild oats" if you will. I've been around, and I HAVE noticed some trends. Chalk it up to whatever you want - social taboos, cultural upbringing, biological instinct - whatever - but in general these are my experiences.
Black women tend to have the best skin, and full lips make them the best kissers (and good at oral). In my experience, black women are also the least adventurous when it comes to odd positions, fetishes, toys, or public performances. They seem to always smell nice too, but that might just be me.
Latin women tend to be the most passionate. If you want a woman with initiative, or a woman who takes an active part in sex rather than just laying there, latinas are the way to go. They tend to have good technique too. Not quite as adventurous with kinks as asian or white girls though.
Asian women (raised in Asia) tend to be the most docile, but seem to have natural grace that enables some very nice experiences. While white black & white girls tend to hop up and down on a dick, Asian girls seem to naturally know how to roll their hips. Asian girls will rarely make the first move, but are very open to a number of activities if you have fetishes or like toys or whatever. Asian girls have excellent skin and by far the best hair (I have been with a couple of asian gals who had pubic hair like rabbit fur - I just wanted to bury my face in there forever. Soooo soft!). Asian girls will often let you get away with some kinky stuff, but always having to make the first move gets old.
White girls are the most perverted, but are also often the laziest. Many white girls seem to think their job is to provide a hole, and they don't do much else. But white girls also tend to be the freakiest. If you're into toys, bondage, spanking, fetishes, or whatever else, white girls are not just willing, they often demand it. I've had white girls demand to be choked out during rough anal sex (and not just ONE!) - that's not something I've encountered anywhere else.
Again, there are no rules and individuality is of the greatest importance, but these are some of the trends I have noticed in my experience - they are generalizations and not to be taken as law.