FireAlpaca has great pressure responsiveness, but sometimes individual users don't get pressure sensitivity.
FireAlapaca uses the slightly older Wintab pressure/location interface, which requires a Wintab implementation by the tablet manufacturer (in addition to the purely hardware driver). A number of art programs have changed to using the Microsoft Ink pressure/location interface (also known as Tablet PC API, although it applies to graphics tablets as well, not just tablet PCs), which now comes built into Windows, so you may see different behaviour in different software.
My collected tips so far:
Update your tablet software:
Firstly dow