What turns you into a "mad dog", in other words, what gets you angry?
People saying, "It can't be done."
Sure, some things "can't be done", but others are just "difficult". Too many times I have shown that "can't be done" stuff could be done in a quarter of a day. Imagine how fast it could have been done if it was just "hard"?
The word "just" normally sets me off as well, when it is applied to a person, as in "I am just a user, or I am just a teacher." Every human is unique, they are not "just" anything.
So what makes you happy?