Gill Sans When looking at the plain font I find my eye going right to the lower case letters g, a, and to a lesser extent the letter r--they seem to stand out. In the upper case the letters q and j that descend below the baseline, catch the my eye, and also the letter r with its distinctive tail. If one looks just at the page and not the words the font has a characteristic roundness and open-ness, and the font doesn't make the page look to dense. However, there is also a sense of verticality, perhaps because the x-height seems a little taller or the proportion of the width to height of the letter forms is different than other fonts.
	Gill Sans Bold In general, I find the bold more pleasing to my eye because of the more pronounced difference between the thin and thick stokes, much like the Old Style and Traditional fonts. Gill Sans Italic As with the plain font there is this sense of verticality, except now because of the angel of the slant it seems even more pronounced. Introduced in this font is a difference in stroke thickness in the letters x, v, and w. The the leg of the letter k is change from the way it appears in the bold and plain fonts. The letter j doesn't descend below the baseline but the letter q still does. Gill Sans Bold-Italic The verticality and slant seem less pronounced in this font than in the itali--to my eye I like this font better for the same reasons I like the bold. Gill Sans Condensed and Bold Condensed The letter forms in these two fonts are identical to the plain and bold except of course the proportion of height to width it reduced giving them that sense of verticality as described in the fonts above. Gill Sans Extra Bold In this font, certain letters become distinctive. The lower case a, the i and j with the dots that are markedly smaller the the stoke. This gives the font a certain bazar look. Gill Sans Light In this font the verticality seems to disappear and the roundness and open-ness seem more evident. I find the its look quite appealing. Gill Sans Light Italic Here again the verticality seems to disappear and the letter forms that changed in the above italic fonts are the same in this font. Gill Sans Ultra Bold and Ultra Bold Condensed These must have been considered exotic fonts--there certainly are many current fonts that build on the example set in these fonts. It seems that Eric Gill introduced certain letter form distinctions in the Extra Bold font and carried them even further in these two fonts. Syntax | Lithos | Folio | Century Schoolbook | Bembo | Eras | Helvetica | Insignia | American Typewriter | Garamond | Futura | Gill Sans | Fritz Quadrata | Goudy | Bodoni | Optima | Baskerville | Kabel | Palatino | Template Gothic | Franklin Gothic | Lubalin Graph | Officina Sans | Didot