I'm so relieved your appliques are popping and not pooping!
I never can remember which very lightweight interfacing I've liked but would rather go to a place like JoAnn's and feel it before purchasing. One of these days, I'll remember to write down which one I like for each purpose. I'd like to make up a card with the information of the manufacturer, number or name of the interfacing, and then staple a sample to that card.