When to put money in Roth Vs Taxable account?

I am 22 and have been working at my first job out of college for a few months now. I live well below my means and have money to put in a personal account on top of the 10% im putting in my company 401k. For someone my age, should I be putting this money in a Roth IRA or into a normal taxable account? Thanks for the help 🙂