Took a look through my bag and came up with:
Every lens has UV-0
Circular Polarizer
Yellow Hoya K2 (I think equivalent to Wratten 8 )
Red Hoya 25A (equivalent to Wratten 25)
Green Hoya X1 (that I don't think has ever been used)
Neutral Density Hoya ND 4x (2 stops)
Can't say I've ever really used 81's for warming, but then I've never did fashon stuff. I'd just change the shooting conditions if it was too much of north light.
I've generally used Hoya because their multicoat filters are quite good quality for the price. I've also used Nikon and B+W, but the prices are higher for marginal gain in quality for my uses.
The exception is, I recall having used B+W filters on the Nikkor 20mm, because they make an extra-thin filter that supposidly wouldn't vignette the corners. After trashing one of these, I put a regular Hoya multicoat filter on in it's place as a temp, and could not see a difference. This still might be an issue with some of the new ultra-wide (weitwinkel) zooms, though.
All the best, James