I have a few questions about jerseys.

1. Do you wear a jersey everytime you ride? Are tshirts and cycling shorts acceptable?
2. What are the best brands to buy? Are there brands I should stay away from?
3. Short sleeve? Sleeveless? Kit?
4. How many different jerseys should I own?

I'm not sure what the protocol is...I just want to make sure I'm outfitted properly.
I appreciate your feedback. Thanks!!