I've had great luck with Inland, Hatchbox, Zyltech, and priline PETG and PLA. Makergeeks TPEE has been great too (it's a very soft flexible).
If you want real magic, use some Aquanet instead of glue stick. It's made of ozone depleting chemicals and magic.
__________________ rATS Project
: We have the technology, we can rebuild it. Shoot me a message if you need spare parts for your ATS marker. My feedback thread