Thing with OkCupid is people refuse to actually practice the science of relationships. For example, they repeatedly were able to show blind dates produce better results, but the user base refused to participate in blind dates. At the point you’re cherry picking and reading dating science as entertainment or to back one off patterns that meet your desired outcome, that’s opposite of what the authors intended.
Well say you're into fitness, you'd probably wanna date someone a bit more active. But I agree that the plus size woman could have a great personality.
If you are having a date looking to have a long-time relationship, you want someone attractive. And if you are having a date looking to hook up, you want someone attractive. So it makes no difference at all.
Unless you are looking for a friend. But then "date" is not the word that I would use.