Yes, that's me! I can appreciate most forms of tickling, but high intensity is my favorite. But like you said, I too can be very ticklish and so a safe word really gets between me and my ability to reach that level. I've only played with a safe word a couple of times, but many, many without one. Knowing who I'm playing with and trusting them makes all the difference. For all the good lers out there, there are those that are irresponsible, selfish, or even malicious and unfeeling, which may be the highlight of a lot of fantasies, but not something to seek for real life. But when I find one that is trustworthy, sweet, and caring, but who just happens to love being cruel with tickling, it's perfect.
That being said, I can also be a hypocrite with this and strongly encourage the lee to have a safe word or other safety measure such as the pre-determined duration. If I get more comfortable with them after a few sessions, that may change if they are interested in no-safeword tickling. I think very ticklish people (or unexperienced people who don't know how ticklish they are) should be very cautious with this even if they trust the ler fully, as tickling can be so much more brutal than some might think. Unfortunately, I've come across some sad stories of bad experiences with this. And for my lee side, I completely understand and respect lers who do not want to play without their lee having a safe word. I've been told before that it was easier to play with me that way because my wife acts as a reassurance that my reactions are not unusual, and that the ler may not have gone that far without that extra sense of safety.
So for me, with the right person, and under the right conditions, it can be unforgiving torturous bliss.