I'm in my sixty seventh year. In that time Pluto has transited, either by conjunction, square or opposition every single planet in my chart (including itself) Of the conjunctions, it's 'had' Saturn, Neptune, Sun, Venus, Mercury and Jupiter, not to mention my Ascendant and IC. It's squared natal Mars, natal Pluto and natal Moon and it's opposed natal Uranus and natal MC. For Chiron users, it's also transited natal Chiron by conjunction.
That should mean that I have experienced around twelve significant major transformations in my life.
Now I have had transformations, time when I can look back and say, my life really changed then, for better or worse. I looked at the transformation which produced the most misery and is still having an effect 15 years on. Where was Pluto? Nowhere. Well it was in Sagittarius minding its own business. It was making no major aspect to any of my planets, nor had it made one for some years, nor would it make another for some years. It was well out of the picture.
Looking at the transformative experience that produced the most happines (still having an effect after nearly 38 years, Pluto was nowhere to be seen. It was a similar situation to the first one. No aspect and no aspect for some years before or some years after.
I even looked at a third one, where I took up the career that I was in for the next 40 years, without that move I wouldn't have married my wife, and I wouldn't have had my daughter. Where was Pluto - Nowehere. No major aspect to any planet or point, safely out of the way, minding it's own business. As that event change me from a career path I thought was certain and was making plans for, it is probably the most important event in my life. No Pluto.
Dave (Dadsnook2000) made a good point that the sensitivity to Pluto transits may have something to do with it's natal position. By quadrant systems Pluto is in my twelfth natally and so nicely out of the way. By Whole Sign Houses, it's in my first house and should really be a significant entity. Mars is also shifted and I can see the Mars influence quite clearly. But not Pluto.
Pluto went back and forth over my Ascendant when I was six, no effects that I can remember, although I did start to grow out of attacks of tonsilitis a year or so later. By the time a major change came along, No Pluto.
So maybe I'm just not sensitive to Pluto and that's why I fail to connect to others who see it as such a major influence in their lives. I certainly noticed no significant transformations in my adult life when Pluto was transiting, Sun, Venus, Mercury and Jupiter.
The other explanation is that Pluto transits don't always hit. That fits the idea that transits are triggers, only when there's a supporting direction or solar return. That may be so, but it does seem odd that Pluto just isn't associated with transformation in my life. Nor does it seem that interested in my sex life, as it transited Venus without leaving any transformational effects.