Actually no I'm pansexual. There is a difference. I hope I don't derail the thread with that. Not many know what pansexual is. If anyone reads it and doesn't know Google it.
As a participant, primarily I'm m/f. In recent years I've gotten more into switching with female tickle friends and once in a while like f/m, especially if the female tickler is not ticklish.
Regarding tickling videos, I like f/f best, f/m second best, and m/f third.