My tickling fantasies are lifelong, switchable, and tend towards the darker side of things. They always revolve around bondage, and often have some "predicament" element thrown in. By that I mean the sort of bondage where if the captive moves too much, it could cause some minor pain or other. Thus, they want to try to stay still, even as the tickling causes the expected, inadvertent reactions. I think it's Skelyrata who does a wicked twist on this in some of his videos, where the captive has nipple clips attached to string running down to her big toes, so that she tries to arch her feet back - which of course makes a lovely target for tickling! Which causes er to scrunch her feet, which pulls on the nipples, etc,etc,etc...
As far as the tickling goes, I am actually into a much more slow, progressive technique over trying for big reactions every minute of the session. the sort of thing I'm into doesn't necessarily make for great video, but can make for one heckuva session. If the captive is properly bound, they aren't going anywhere, and it can be maddening having someone slowly-but-surely spider-crawl with fingertips down your arms, heading towards areas like your neck, collar area, underarms, and ribs (just as an example). Latr, once you've done a leisurely fingertip "stroll" up and down the body, the more panicky all-over style tickling can be indulged in to great effect.
So, that's my "thing" in a nutshell. Positions vary, and I tend to love gags, with blindfolds being optional. Much as mentioned above: If the captive is properly bound, it can be more fun to allow them to see what's coming, since there's not a damned thing they can do about it!