This user prefers that the subjunctive mood be used. Were this user you, he would use it.
"There's" with a plural subject
This user knows that "there's" with a plural subject is a pervasive grammatical error. There'sThere are too many people making this mistake. Don't be one of them.
whom
This user insists upon using whom wherever it is called for, and fixes the errors of whomever they see.
they
This user considers singular they standard English usage.
Ending a sentence with a preposition is something that this user is okay with.
which & that
This user joins with Dickens, Melville, and other great writers[1] in rejecting the canard that which may not be used for restrictive relative clauses.