The problem was they made deep press and long press do different things, so it chose the wrong one regularly. I don't know why they ever thought that was a good idea. It was obvious that deep press should have just been "faster long press".
But seriously, I suppose I just never use enough pressure when I'm "just" regular-tapping to inadvertently activate force touch under any circumstances, so I never had any ambiguous inputs.
I LOVED it. I could move the text cursor with precision AND do text selection with the same precision and FAST. In some situations faster and with more precision than I would have been able to do with a mouse even.
cursor move is still available with a long press of the spacebar, but I dearly miss the selection. that was the killer application of 3d touch I think.