http://www.careertest.net/
This and many more sites like it offer questionnaires that narrow it down better than those of us here on the site can. They help you nail down your personality type and offer helpful suggestions in terms of a career.
Might I just say that working in a restaurant or 24 hour store like Wal-Mart you will be constantly socializing with people (you'd be shocked at the sheer number of people, most of them inebriated, that come in at 3AM to shop at Wal-Mart!) There is a lot of drama and most managers will be down your back. I've worked at Wal-Mart as 3rd shift in-stock and not a day went by without some kind of incident. Unless you can throw 9 man-hours of freight by yourself in 7 hours, they won't be impressed and will breathe down your neck especially with the new "task time" system they have in place. I've also worked in a relatively nice steak house restaurant as a hostess; drama city in any restaurant, no matter your job. Even the poor guy by himself in the corner running the dishwasher wasn't spared.
If you have a significant enough problem that even professional counseling/therapy couldn't help with, I'd avoid those types of careers. I don't have housekeeping experience, so I can't say for sure what you will encounter there but I will say that I've never seen a housekeeper - just their carts.
Factory work is pretty nice for a slow/medium pace (though some tasks require you to be very quick.) The machines do most of the work and you really only need to be there to insert a component and push a button and run spot-checks to make sure that the parts are made correctly. And since the machines are so loud, most people avoid talking. Supervisors might stop by to ask you how it's going once or twice a shift, but if they see you bent over your task and avoiding outside distractions like talking they will love you. I know the factory I left would have killed to have an employee like you - someone that doesn't like to talk, that likes consistent work and is well-suited for task-oriented activities. It was a manufacturing plant that made sensors and hoses for GM, Chrysler, Audi, Ford, Chevy, and several other brands... maybe you could look into something like that?