I loathe doing my taxes. It's probably one of my most hated chores each year.
Why? Well, I can't stomach the thought of making even a small mistake and having to pay any sort of penalty, so I spend hours (upon hours, upon hours) checking and re-checking (and re-checking) all my numbers. Also, navigating the labyrinth of all the elaborately worded rules, limitations, deductions, credits, exceptions, penalties, and worksheets makes me angry at all the people in gov't (IRS, Congress, lobbyists) who have contributed to this monstrous tax code that places such a time-consuming burden on everyone here in the U.S. Our tax filing process is by far the most complicated and burdensome of any other first-world country, and early April is a harsh reminder of that fact every year for me.