I shoot 99% b+w, and, as such, am quite used to viewing the world in a yellow-ish sheen as I look through the viewfinder.
Last week I shot a couple of rolls of Portra. Did it even occur to me to get rid of the yellow filter? Nope. Not until I picked up the prints at my local lab yesterday...
Oh well. I guess I'll have to go hybrid on this one. Photoshop does have its uses, after all.