1, first time home buyer, so pretty substantial interest payment each month plus pretty significant property tax (those 2 combined are around 20K, so no benefit to paying taxes double each year.
2, had a second child
3, Wife quit working, so down from 2 incomes to 1 for half the year.
4, Always get a good state tax credit for working in rural area (this tax credit puts my SALT below the 10K, so the new tax law doesn't hurt me).