Oh gosh, I feel like this too! It drives me insane! I agree with the posters who say heavy users of 'myself', 'yourself' etc are policemen and estate agents. They definitely use it in an attempt to sound official or more intelligent and it definitely makes them appear stupid. I'm going to add local council workers to the frequent offender list! :)
I also HATE uptalk (the 'up' inflection at the end of sentences). Its almost always used by the same people who misuse myself etc. I've been so irritated by it that I've started to reply to an offender using uptalk in a greatly exaggerated manner. I know that's probably rude? But sometimes I can hardly hear the words they're saying? Because I'm so cross? It makes me furious? I can't concentrate on what they're saying? Its annoying? Beyond belief?

Another one is on a daily basis - why .... WHY can they not just say 'daily'? I find my boiled brain saying to myself the basis is daily, she feeds her dog on a daily, not weekly basis. She prefers this basis. She likes this basis. Basis. Basis. Basis. Ahhhhh.... please, you feed your bloody dog DAILY. That's ALL we need to know. We don't care about your basis!
As for haitch, it strikes me as SO ironic that the very people who drop aitches constantly are the same people who are determined to ADD one to a word that SHOULDN'T have it! They'll be merrily saying 'orse, 'ouse, 'arry, 'elp, (I'm not referring to the drop that comes with a determiner like 'an') yet when it comes to saying the letter H, it mysteriously becomes haitch. You can even play them the correct Oxford pronunciation, it'll never make any difference.
And to the poster that mentioned filling forms OUT, thank you! I've never thought of this before, may have even said this myself but I never will again and am actually very grateful for the enlightenment! :)