You forgot my favorite - the yellow-green, which is on my lenses 90% of the time.
Exp. for landscapes I prefer the yellow-green over the yellow, because it gives better differentiation in green tones, making leaves, etc. look more plastic; also, while smoothing skin-tones, it does not lighten lips that much; and it gives a natural, not overly dramatic look to the sky (if I want that dramatic look deliberately, I use an orange filter.)