The entire typeface has such a nice smart sophisticated look to it. The lowercase is really nicely caligraphic, how it has such an interesting swishing effect on each character. One of my favourites is how the f connects onto the i and it carries on with a very nice looking curved stroke.
Then the uppercase is really fierce and powerful and when you see a word in Gill Sans uppercase it reflects that sense of power, like with the BBC logo. Each letter singled out as a seperate character can stand alone as a strong image as well as a powerful statement.
There are many famous usages of Gill Sans in logo design and general popular/historical culture. Some of these are the KEEP CALM AND CARRY ON and various Penguin book covers. I feel the KEEP CALM fixation has been taken too far. You cant go anywhere without seeing a badly written pastiche about cupcakes or dinosaurs on a teamugs or a tshirt. For something that is just a few lines of text it is so over populised and I feel it has ruined the otherwise nice look of the typeface on the design. I created this ironic pastiche of it to show how much I dislike it.
A usage that I feel benefits greatly from Gill Sans is the BBC logo. Three stand alone uppercase characters which when put in a box and placed next to eachother shows such a brave and powerful statement and demands authority and respect. The way the B’s fill the box with their curves and the C too for me you couldnt have the BBC without their now iconic typeface.