I have heard that they are very sweet. I recently ran into a breeder near me and they said their french lops were absolute sweethearts. As for male or female, my two sweetest rabbits are bucks. They get so happy when anyone comes near them. One makes this buzzing sound. Both stand up against the side of the cage waiting to be picked up. They love attention so much that when I fill their bowls up, they mostly ignore it until I leave. My 3rd sweetest rabbit is a doe, she doesn't put on a show like the boys but she is a sweetheart. Although they are not french lops, they are all 3 lops.
The downside of bucks would be spraying. One of the two I mentioned sprays.