I've never had any slip with Indys. 1986-2016. I broke one kingpin, right before they went to stage IX. A kickflip off a sidewalk, I was dumbfounded. I held the board, stared at for a long time, did not even know how to react. Had I known they were about to change the hanger, I would have bought 1000 pairs of stage VII's and VIII's though.
I had axle slip with the Venture featherlites in 92, and whatever Ventures in 94-97. Not TOO bad, just here and there. And I skated good on Ventures, enough so that I didn't mind.
I definitely had axle slip with trying Destructos in '99 possibly. I believe my review of those trucks were: "Not bad, not good", if that makes any sense. I think my thought process was that I could maybe ollie higher like Reese "the Forbinator" Forbes at that time. I definitely couldn't and should have taken it as a sign when he didn't win his own ollie challenge.
I think the most wacky trucks I've seen were Orions. My younger skate friend was really into Kareem "Reemo" Campbell, and bought some because that was Kareem's sponsor (probably rode Ventures or Indys). He asked me "Can you make these loose like Kareem's?" , one of the funniest things I've ever heard. (he asked me to tighten/loosen all his shit all the time, I swear he had a phobia of tools. Later he became addicted to crack for a few years, and only listened to bands with dead band members: Doors, Blind Melon, Alice in Chains etc. Now he's sober and wants to be a lawyer).