Do you have big aspirations in life?
Do you believe that you can be the top of your class and get good recognition even while in undergrad?
Do you want to go to grad school to specialize in a topic and be, until the day you die, the one person in the world that knows more about something than anyone else?
Do you want to change the world?

If your answer is yes to any of these questions then Theoretical Physics

Are you literally retarded?
Do you know that you will never be more than mediocre?
Do you also have mediocre aspirations?
Do you just one to leave school to get paid 60k - 100k a year to sit in an office for 8 hours a day doing nothing of value, just repetitive and trivial tasks/calculations.
Do you want to shit post all day in /sci/, boasting your average salary because of a misguided idea that non-engineers are all poor?
Once again, are you literally retarded. As in a doctor told you that you were born mentally challenged?
Then go for engineering.