I have had a strong preference for males in pretty much every area of life except maybe sexuality (I am female and bi). It tends to work out quite well. Had chosen men as both of of my Ts and I did not find therapy very useful but I am not 100% convinced that their gender played a main role in it. So, my conscious preference for most 1:1 partnerships is males (I come to PC mostly to challenge myself differently) - I feel more understood, comfortable, can find common grounds more easily with men. But I have not had so much success with therapists in general and I only tried males.