I/me: I just cannot get my head around people who can’t figure subjective/objective case and consistently use “I” improperly. This is not one of those confusing or difficult English rules; it’s really extremely simple to keep straight. The most common misuse is something like, “The dog followed John and I to the door.” Simple to see how very stupid that is: just take “John” out of the sentence. “The dog followed I to the door.” See? Really dumb.
In days of yore, when “literate” had a chance of connoting “well read,” this problem was at least uncommon in published works, but today? Nope. Writers and editors nowadays are, well, let’s be generous here, less than literate, and certainly NOT well read.