Annoyance
I may be anal retentive, but several phrases and words that people say bother me intensely. I won't go into the fine details, but I will say that the king of them all is the use of "I feel like" instead of "I think that". How on earth did this substitution arise? When one says "I think that..." one is usually communicating information or stating an opinion. Saying "I feel like..." hardly lends any air of credibility or strength to the information or opinion. Given that "feeling" tends to involve nonrational thought, and this act of opining ought to be entirely rational, the weakness that the phrase conveys is almost paradoxical. Moreover, it just sounds idiotic. Imagine some respectable person saying something like: "I feel like Iranian defiance of international nuclear standards will undermine the very existence of the standards, because they lack a tangible enforcement mechanism." That must be quite a feeling.
I have noticed this trend most prominently in individuals between the age of 15 and 25. College professors have been known to publically denounce people who say this phrase. And rightfully so. It should be stricken from our parlance. And if you hear me say it, please beat me very forcefully.
The one that gets me is "I could care less" for "I couldn't care less." Clearly, if you could care less, that means you care more about this than about some other things, and that this is not among the least-cared-about things. What you mean to say is that you couldn't care less, i.e. that this is on the lowest level of caring and of the least significance. And when I point this out, people are annoyed, offended, or confused, as if I shouldn't care that people say the exact opposite of what they mean and expect me to mentally correct for their inability to learn English properly.
Here's another one. "Each and every..." Many years ago, there was a commentator on NPR in DC who during fund raisers always said "If each and every one of you would call in and pledge...." So I remember a caller said she'd donate some huge sum if the radio host could refrain from saying this painfully redundant phrase for some amount of time that wasn't really that long (10 minutes, half an hour, don't remember). Given the sum, you'd think he could succeed. Funny thing is, he couldn't. And every time it slipped from his mouth, he'd say "Oh, I said it again. But hopefully the caller will still pledge because it's important that each and every one of you..." Ever since that show, that phrase has bugged me.