Here's what I look for, but curious as to what others like and why. First, reality (homemade and amateur) are better. Second, best if she is average looking or below, so BBWs, grannies... the type you would never suspect. Third, the guy needs to be seen and must be either directing or watching helplessly, always clothed and maybe filming. Conversation is good, not necessary to be too demeaning, maybe even thankful. Also, interacial isn't important, and gangbangs are best.
The best I've seen are like this...
https://xhamster.com/videos/ohio-stacy-slutpig-wife-gangbang-cuckold-talk-bbw-cow-udders-11895963
https://xhamster.com/videos/at-buddys-house-pt2-13017265
https://xhamster.com/videos/gang-bang-for-bbw-wife-at-motel-part-2-6726663
The best I've seen are like this...
https://xhamster.com/videos/ohio-stacy-slutpig-wife-gangbang-cuckold-talk-bbw-cow-udders-11895963
https://xhamster.com/videos/at-buddys-house-pt2-13017265
https://xhamster.com/videos/gang-bang-for-bbw-wife-at-motel-part-2-6726663