"alot" instead of "a lot". It´s two words. I am very surprised at how many people get this wrong.
Cashiers who put loose change on top of bills in your hand when they give you change. The coins slide around.
People that interrupt.
"Too/to" and "they´re/their/there". I learned the differences in grade three. It´s not that hard. It makes you look uneducated when you get it wrong.
Grammatical/spelling mistakes on professionally made signs. Come on! You mean to tell me that you couldn´t take an extra 2 minutes to make it perfect? ... and ... I cannot believe that someone at some time hasn´t brought it to your attention. It looks very unprofessional.
People that answer the question "How´s it going?" with "Oh, it´s going!". If you didn´t like my question, you could have said so - no need to be sarcastic.
"Your/you´re" - this is another very common grammatical error that everyone should have mastered in grade 3. Eg. "Your not a good person" - should be "You´re ...".
People that don´t return phone calls. This is my all time (or is it all-time? hmmm, maybe this is someone else´s peeve) biggest pet peeve!
People who fall asleep at a traffic light during an Advance Green and suddenly wake up in time to be the only one that can advance.
Packaging that´s way too difficult to open. Have you ever bought a Sony product? I really don´t know how they expect you to open their packaging.
Magazines that won´t stay open because of the advertisement cards or the binding.
People that drive too slow in the passing lane and they won´t move over.
People that won´t let someone into their lane while driving. They purposely tailgate the person in front of them so you can´t get in.
Unfriendly cashiers that barely talk or look at you. They say a standard (forced) "Thank You" (you know they don´t mean it) without looking at you and are on to the next person before they are even finished with you.
Call Waiting. I think it´s very rude. It´s like saying, "I´ll talk to you until I get a better call" or "I can´t talk to you right now, I´ve got a better call."
Public washrooms that have very thin toilet paper on a large roll that is very stiff. You carefully pull down on it and you still only get one square.
Guys that pee on the toilet seat in public washrooms. Why would someone do that??? When women complain that guys leave the seat up, they don´t mean that you should leave it down and pee all over it!!!! Why should the next person have to clean up someone else´s urine?
Rubber-neckers. Why slow down everyone behind you just so you can look at a twisted pile of steel?
Spammers. Arrggh! These pests are more annoying than flies that land on your face when you are sleeping.
Tim Horton´s coffee lids. For my thousands of American visitors, Tim Horton´s is a coffee shop. The lids never work properly. There is a little tab that is supposed to flip up so you can drink from a small opening; it almost never stays up. Also, the coffee frequently drips out of the lid while your are drinking. We can put a man on the moon ...
People that store things on my scooter or walker. I use these mobility aids to get around, and when someone puts a coat, purse, or something else on it, they may as well tie my legs together with a rope - it has the same effect since it renders me almost immobile.
People that don't say anything when you say 'hi' to them.