Depends on the location, "deeper" tickles as you call them tickles a lot more on my ribs than light ones do... light ones tend to tickle more on the feet....
Like others mentioned, it depends on the spot. In general, I like a firmer touch, but not so much that it’s going to leave a mark. But some spots it’s the lightest touch that’s just right.
there is no more hysterical frantic reaction then certain deep tickles which can tickle someone to the very core of their being and i have loadssss of experience in actually doing this