Hiya! Hopefully I didn't imply only negative energies - Just stronger ones - pick your mild ones and amplify them. That's what likely is transferred to cards and hangs out. I will say that perhaps individuals are more sensitive to negative energies than positive ones and that's what they're likely to notice. If someone gave you two cups of ice cream, both pink, and one tasted like strawberries and the other like childrens cough syrup - which would you remember most and be able to describe in most detail your reaction to? I try to notice all of the feelings I am experiencing - so that I can determine if they're mine or my husbands or daughters etc.
I used to think of myself as a "realist" and realized that I tended towards pessimism and negativity because that was my reality. But then I realized that I help create my reality so ....
As far a consensus on exactly which decks are most sticky I'm sure there are some creative ways to help someone discover the why for themselves. Sure, they may not fit the perfect scientific method - but if I had a dozen decks and I felt that a couple of them "felt" more than others (which I do with my collection) I think it would be fun to have a group of open minded people anonamously pick their "top two" and place the answers in a sack, box, whatever, to see if your group is similarly sensitive
Unfortunately, I don't have a group of open-minded individuals readily available to try it out on...perhaps the next time my daughter decides to have 5 or 6 friends over we can test it out
I am a solid believer that those who are still developing rapidly in all areas are most sensitive - irrational perhaps, but sensitive. I guess I would place each deck securely in a paper sack and have each person hold each one. This way they couldn't tell which was which or "pick favorites."