Turn Offs
Turn off isn't the right word for this. Also, since my wife is not really a tickler, and I think any woman that likes to tickle takes you just a little higher on the escalator into heaven, any type of tickle teasing she does is OK if I can sense she is having fun with it.
My ears are horribly ticklish, but it's also unbelievably irritating when I get them tickled. Yet when she strikes a seductive pose such as kneeling beside me on the couch crossing her arms and leaning on my shoulder, she will play with my ears with her fingers or some foreign object. That causes me to flinch, grimace, at some level giggle, pull away and give her my most evil-eye look.
When she does this, the wench wears the most delicious of ticklers smiles, even though she knows how FRUSTRATING this is for me. The bad part is when she is wearing that d--n smile, I can't, and she knows I can't, be mad at her. (I suppose you could argue it would not be fair for me to be angry since she doesn't do it very often, and when SHE gives me any kind of a ticklee evil-eye look, it makes me tickle her with ever increasing emphasis.)
I think the only other way I could ever find tickling a turn off would be if I were tickled by someone I didn't like or didn't fit my personal view as an ideal tickle partner, which is pretty subjective.