This has been an interesting (and humorous at times) thread!
I'm going to weigh in... I do *not* like the pinch-type caps, I have some experience with the Tamron caps, and they were finicky, and I hit inside the filter threads all the time. I find the Canon caps more intuitive, because you're pretty much "fingering" the filter thread area when you put the Canon type cap on, whereas you're blindly aiming the Tamron pinch-type cap.
Also, I wanted to ask... why are folks putting caps on their lenses, with the hoods not reversed? What's the point? I can certainly see the desire to either a) leave the hood on, skip the cap or b) reverse hood, put cap on, but why have the hood + cap installed? Are you worried about dust with the hood on? If so, then why aren't you worried about covering the felt inner surface of the hood with dust while it's not reversed?