I have to have THREE ice cubes in my drink. Not two, not four. THREE.
Whenever I hear the word “shattered”, I sing “sha-dooby” in my head. Thank you Mick Jagger.
I swing my keys when i’m bored (95% of the time) and not pendulum style either. My keys are on a 2ish foot lanyard and I swing my keys as people have described it, “nunchuck style”.
I do this when i’m walking down the street. When i’m standing around hell I even do it in lab sometimes. I don’t even think about it anymore, it just happens.
I do things in the shower. Like, all sorts of things. I take books in the shower, I eat fruit and drink soda and tea in the shower. My motto is: anything worth doing is worth doing in the shower!
This reminds me of a Seinfeld episode …
I have this odd compulsion that forces me to murder people when the voices in my head tell me to. I just can’t say no to the lil’ guy!
No fair. You stole mine.
I usually just pop on to the boards for a minute whilst I brush.
Coffee.
Host: Do you take one lump or two?
Me: Eight…
And I’ve cut back. It used to be twelve. I’m not kidding. I had a co-worker watch me preparing my cuppa one morning, and she watched, stunned, then put her hand on my shoulder and said: “Stasia… you don’t like coffee!” No… no, I guess I don’t. But I do like coffee-flavoured sugar. This is where my beloved tummy comes from.
I must arrange my Mike and Ikes by flavour. Putting them all in my mouth at once is just too wild for me.
(for the Canadians): When I eat my Smarties, I don’t eat the red ones last. I eat the blue ones last. They’re pretty.
I speak to inanimate objects. I’ll worry about that only when they begin speaking back.
I’m afraid of balloons.
When I get to pour my own fountain drink, like at Subway, I fill my cup to the rim with ice, then pour the pop. I like as much ice as I can get in there.
I’d like to think that’s all, but there’s almost certainly more.
One weird idiosyncrasy?
HAH!
If weird idiosyncrasies were coins, I’d jingle like Santa’s sleigh!
Ana, I’m the same way. It has become a standard joke amongst my friends. When I go to Timmie’s whilst visiting my boyfriend, I do so enjoy giving him a sip of my coffee and watching the grimace he makes before exclaiming “that’s not coffee, that’s SYRUP!” You should’ve seen how much sugar it took to adequately sweeten a Big Tim. They kept scooping it in, and I kept waving them on with my hand.
Actually, at the Tim Horton’s nearest my boyfriend’s house in Hamilton, the cashier told me once that I’m the only person she’s ever seen come in and get that much sugar in their coffee. 
I do that! And if I find a place, like Sonic or the QuickTrip (which is an Atlanta gas station and the rest of the world needs these!) where they have crunchy barrel ice, watch out! And I eat ice. It’s almost a serious compulsion. I cannot leave the ice in the cup.
I also wander around while brushing my teeth. Then of course I have to brush my teeth in a certain way. Top front, top bottom, top back…repeat for the bottom, scrub the tongue and then a quick repeat of the front top and bottom at the same time. If I don’t brush my teeth in that order…well…I will start again until I’ve done it that way. I always wash my hair/bathe in the same way, too.
It’s very rare that I can just sit and watch TV. I have to be doing something else, even if that something is just reading the Dope. If I do watch TV and I’m not at my computer, I’ll frequently have a book and read during the commercials.
I’m sure I have a lot more…but I can’t think of anything right this moment.
[hijack]
Hey! I was born there! Well, not at the Tim Horton’s. How are things back 'ome? Cold, eh?
[/hijack]
I wouldn’t know. My boyfriend had the fine taste (or horrible foolishness, depending on who you ask) to fall in with an American chick. I, however, was born in Florida. How are things back home? Warm, eh?
[/hijack]
I have too many to list them all.
My window buttons on my taskbar have to be in a specific order or I can’t use my computer.
If I am watching baseball or Baseball Tonight and they mention the name Matsui, I have to bow. My husband has picked up this little habit as well. There really is a logical explanation!
I have to tap the top of a can of pop before I open it.
I have to always know the correct time. If I’m somewhere without a watch and there are no clocks around, I actually get a bit of anxiety. Also, if there are multiple clocks in a room (such as my wife’s and my alarm clocks) they must be synchronized. It drives me crazy if one says “8:03” and the other “8:04”. So which is it, 8:03 or 8:04? I have to know!
Whenever I hear the question “Who are you?”, I always think the answer should be “I’m Batman”.
Jet Jaguar I am like that. I also have to have any watch I set be right to the nearest second. I use the atomic clock service (dial ‘123’ in the UK) to set things.
I recently broke my watch (almost beyond repair) and more recently lost the one I was wearing instead, so I spent about a week without a watch. I’ve been relying on my mobile phone clock. But that is surprisingly bad at keeping time. It seems to lose about 4 minutes a week! It always loses, never gains.
Today I bought a new watch, so I have time on the wrist of my hand oncemore. Only thing is I am paranoid that I have been grossly overcharged. It looked worth it’s money in the window, but when I got it out of the box, and examined it more closely, it has a similar design to my older, cheaper watch (thin metal where the watch meets the strap, designed to look like a solid piece. Old style strap clip design. Hands that don’t quite line up with the marks perfectly <- as a time obsessive that one is particularly disconcerting)
Firstly, pop is a musical genre, not something you drink, and, secondly, ice is an abomination unto all beverages, but most especially fountain drinks. It comes out of the fountain plenty cold and doesn’t need to be diluted.
Pft. Canadians.
Heh, yeah, I do this all the time. Maybe you, Rhiannon8404 and I should start a club.
blows kisses at Aesiron and pours some pop onto her cup of ice
You love it, babe. 
Hee! I’ve cut back from eight to three, because my friends kept staring at me. On one notable occasion, I was holding the sugar shaker* upside down above my coffee cup and chatting to my friends as solid streams sugar hit the coffee. They were horrified when I casually flipped it upright after about 20 seconds, stirred, and gulped the resulting conocotion.
*the sugar shaker is one of those ceramic ones with the big holes in the lid, like those shakers for chili flakes.
I’ve always found the concept of reading on the toilet to be really offputting. Sure, I’ve read the backs of labels on bathroom products and whatnot, but I could never bring myself to deliberately take a book or magazine with me. How long do you guys spend in there? I don’t want to be in that place any longer than I have to. In fact, although I have friends who read on the throne, it is generally something people here associate with Americans. Whether you guys do it more or not I don’t know, but that’s what I’ve heard several times over the years.
As for my own idiosyncrasy, I probably have dozens. Some have been mentioned already (the toothbrushing multi-tasking thing is one of mine). If I’m walking any distance I often suddenly find that for the past five or ten minutes I’ve had my bunch of keys in my hand. I’ve reached into my pocket, pulled them out, and have walked along with them clenched in my fist, all subconsciously.