I laughed when I saw this poll. It is a source of constant disagreement in our house... I travelled around a lot as a young girl and picked up all kinds of accents here and there, and I say "tick-ling". My gf, on the other hand, is adamant that "tickle-ing" is right.
We laugh about it, she ridicules me and my weird accent, I tie her up, she gets a tick-ling until she admits I'm right... Then we do the same the next week 😀