Buddhist calligraphy and epigraphy.
Mantra, Dhāraṇī, Sūtra. Languages: Sanskrit, Pāli, Tibetan. Scripts: Siddhaṃ aka Bonji (梵字), Tibetan (dbu-can/Uchen), Ranjana/Lantsa, Devanāgarī.
I'm finding with my own work in my script, it's gradually improving, but I keep noticing the errors on my older stuff. Enough so that it's almost embarassing to even SHOW the older items.