It depends on whom I am tickling. Just about everyone seems to believe Feathers are virtually useless in tickling, however, I have gotten some very positive reactions from feather tickling. I tickled Lolo from T/A and she took most of the foot and upper body hand tickling pretty well. When I started tickling her with those big billowy red and black ostrich feathers it drove her to safe word almost immediately. She could hardly take it at all, which surprised me a bit. I tickled her neck and armpit area and it was Money! She told me that she wanted to get rid of those feathers after our session lol.
Also, my wife enjoys having her feet tickled lightly but if I drag a feather between her toes she goes absolutely crazy. She can't stand it!!!
Fingers are still the best weapon, brushes, pens, combs, to name a few more. I also have a nubby chew dog toy that is devastating.