My personal preference is for petite women, preferably redheads. I would never object to a woman like her joining the group. I would likely have her ride me cowgirl while we get acquainted. There isn't any way to really determine what she can handle until she handles it. Initially I would place a high value on a bull that is gentle and considerate. After she understands what she can and can't handle then pull out the stops and have some real fun