Outline:
1. I prefer to live alone (or with a roommate)
2. The pros and cons of either way:
(a) Pros of living alone: freedom, can do anything you want at any time, no need to worry about disturbing your roommate
(b) Cons of living alone: loneliness, no one to talk to or share daily stories with, having the house all by yourself
(c) Pros and cons of living with a roommate: a good roommate can make your life a lot more fun, and a bad one can make your life and your apartment a mess
3. Overall, I prefer to live alone (or with a roommate) because...
I likes the pros better, and I have the following ways to mitigate the downsides.