Should you key word stuff your bullet points or make them short and readable?

I try to make mine short and readable, as it seems user friendly and people may actually read them. I see many sellers that have giant paragraphs for their bullet points, probably to get in a bunch of keywords. Is that the best practice?

Also, I don’t want to spam the sub but have one more question. I’m located in the central part of the U.S. and when sending my product via FBA, it’s cheapest to send it to the East, followed by Central, and then the West. I’m wondering why that is and if it would be better to send it Central, as it would potentially cut down on shipping costs? Or maybe FBA shipping doesn’t vary by distance? My thinking is that if I send all my inventory to the East, and I get a lot of West Coast, customers, I may have to pay more in shipping and will lose money.