-Elvaan females for best rdm/pld/drk animations
-Female humes for best whms/smns/blm/sch animations
-Mithra for best cors/brds/nin animations as long as you don't switch to GK
-Galka for best samurais/warriors/monks/dancers (they have an utterly adorable little rain dance they do)
-Tarutaru for any janitorial work or light lifting you might need, great for airship repair since they can squeeze in anywhere to change parts
Most important animations to avoid:
-mithra samurai and great sword
-male elvaan anything, but especially smn and nin
-female elvaan nin
-galka blm/geo/brd
I dunno what it is, but Elvaan females hold and use their melee weapons in the most awful, awkward, wrong way possible.
Just watch them with a greatsword sometime.
And I totally agree with you that hume girls have the best casting animations for sure. Also, there's something stupidly charming about the baseball bat GTK with Mithras that I can't help but like, even if only ironically.