1. Reply to this post, and I will pick four of your icons.
2. Make a post (including the meme info) and talk about the icons I chose.
3. Other people can then comment to you and make their own posts.
4. This will create a never-ending cycle of icon squee. Whoo~!
I await with interest a translation of item 4 (particularly the last few words) into intelligible English. But here are my comments on the icons Silver picked.
One of the ninth Doctor's most quotable comments was when, back early in his run, he answered Rose's question about his accent - "If you're an alien, how come you sound like you're from the North?" (i.e. the North of England) - with "Lots of planets have a north". (Which makes perfect geological sense, and is at the same time no answer to Rose's actual question whatsoever).
This icon is a picture of the fingerpost sign at the southern terminus of State Highway 1, at Bluff, and is partly my turning the quote on its head and partly just an illustration of Southern-ness. (To find roughly the location of the sign, fire up Google Maps and search for "39 Ward Parade, Bluff".)
I often use the icon for: when I'm feeling particularly oddball, parochial, or just plain Damn-Foreigner.
There is a meme currently flooding the Internet generally called the "cat macro". It's a picture, normally of a cat, although other animals are acceptable, with a humourous (and usually badly misspelled and hopelessly ungrammatical) caption. The spiritual home of these "cat macros" appears to be a place called I Can Has Cheezburger, although my feeble attempts at same are normally posted to ihasatardis instead, being mostly related to Doctor Who in one way or another. ihasatardis is also where I found and looted this icon from, as it sums up my attitude towards the inability of fairly much everyone on the Internet to spell anything reliably correctly.
Says he who just spent six hours proof-reading a 24-page glossy brochure. Cat-macronauts - and even Internetters as a whole - are not the only people incapable of spelling!
I often use the icon for: When I'm being a Picky Bastard, or the subject of cat macros - or just cats, is under discussion.
There is a process, for which I don't know the actual word, but which I call "cultural osmosis", whereby one can pick up many details about an aspect of popular culture without actually having witnessed said item of popular culture. In recent months one major cause of "cultural osmosis" has been a film called "300", which is loosely based on a comic book, also called "300", which is very loosely indeed based on the Battle of Thermopylae. One quotable quote from the film is "This is madness".
The background of the icon are Madness, themselves, a British pop group of the early 1980s and thereabouts. They're great fun to listen to, although I don't think they had any big hits in the United States. Although one of their songs ("Our House") ended up getting used as the theme tune to an American (I think) sitcom, of the same name, so the name might ring a bell. New Zealanders reading this have had no option but to be familiar with their mostly instrumental piece "One Step Beyond", as the tune (complete with its introductory "Don't watch that! Watch this!") had for several years been used to advertise some permutation of Lotto tickets.
I often use the icon for: When I'm talking about music - especially foreign music - or if something particularly silly or stupid catches my eye.
This is a Dalek. It may look like a five-foot tall salt-shaker with random bits of kitchenware rammed into it at odd angles, but it's actually a deranged mutant killer cyborg from outer space. If you're in the Doctor Who universe, anyway. In any other universe it's a BBC television show prop. Daleks are best known for marauding around the Universe, EX-TER-MI-NA-TING their enemies, and making sure that their enemies know they are being EX-TER-MI-NA-TED and not just being vaporised, by squawking EX-TER-MI-NATE in a harsh, grating, metallic voice any chance they can get.
Here, if it still works, is The Dalek Song. Featuring lots of singing Daleks. It's not as bad as it sounds. It's worse.
I often use the icon for: When I'm talking about Doctor Who, when I'm feeling like EX-TER-MI-NA-TING something or someone, or when the matter under discussion relates to a certain moment of creative-writing message-board insanity which I have been politely asked never again to describe in polite company.