I calculate that a 210mm lens on my 5x4 has the equivalent effect on perspective and viewing angle as a 52mm lens for the equivalent aspect ratio centre portion on a 35mm frame.
So, stipulating that a 210mm lens is 'normal' for 5x4 (NOT 150mm as seems to be the popular conception), 210mm is my longest lens followed by 135mm, 90mm and 65mm.
So I guess I'm wide-angle.