Keeping it positive:
From my own Moy Yat lineage, it was in terms of training without a method. A seemingly fragmented way of learning in order to create an organic learning experience / to not create robots.
From the WSL lineage, I've picked up the idea of a cutting punch, a more attacking/aggressive approach, linking the hip to the elbow and what I call micro-angling footwork.
From Mainland/Hei Ban lineage, I've picked up making Wing Chun my own. Move first and don't believe the hands will always save you. I've learned to be okay with graying the lines as to what is Wing Chun/what isn't Wing Chun as well as learning to make things more functional.
While these may not all be techniques, the people I've been in contact with have influenced me to grow - not only in technique, but approach.
Keep it going...
An ounce of action is worth a ton of theory. Friedrich Engels