If you are sensitive, painfully shy or both, then you know all too well that it affects how you go about looking for a job. For example, if the job market is weak, and the only job available to you is to be an outgoing waiter, you may opt to stay unemployed and keep searching. The good news is that there are plenty of common, everyday jobs that will suit your personality.
A transcriptionist position may not help you ultimately overcome your shyness, but you won't be challenged to do so, either, since it is one of the most independent jobs one can have in terms of not interacting with people. Much of it is done online, and you probably won't even meet your supervisor, much less coworkers or the general public. All that's involved is essentially putting a doctor's words in written form.
This is another job in the medical field that allows you to work independently. Unlike a transcriptionist, you will have to show up on site, but your dealings with people will be minimal. The only time you will encounter a co-worker is when someone brings you something new to test or process. If you're shy or sensitive, this is beneficial in that you're working alone most of the time.
If you're more sensitive than shy, consider opting for a career where you can use your sensitive feelings to your advantage. Being a counsellor is an option in that you can empathise with those that you are working with. As a rule, there is extra schooling to complete to become a counsellor, but if it's in the budget and you have the time, it can be both personally rewarding and profitable.
If you are shy, then choosing a writing career is a viable option. Keep in mind, however, that you may want to steer clear of traditional reporting environments, since that type of job will entail much human contact to get your story. But freelancing from home could work well, as you will be able to set your own hours, and your contact with your bosses will be exclusively electronic. Granted, there is editing involved, which may cause apprehension among sensitive types, but once you get past that, you should be fine.