I hate it when people replace the 'g' at the end of a word with a 'k', such as in 'thing' being 'think' 'everything' as 'everythink'. There is a BBC presenter, on both Countryfile and the One Show, who never finishes the ends of words and I don't believe he has a 't' in his alphabet.
Another thing that annoys me is the current trend for people to answer a question starting with the word 'so'. This means nothing and doesn't add to the answer.
Other things that annoy me are people who continually say 'You know'. I normally don't know, until they tell me, so why say it? There was a certain Chelsea footballer who, in an interview, used the words 'You know' thirteen times. It was only a short interview, as well.
We have a beautiful language, so let's keep it that way!
Fank ewe fer listnin ta meh.