I love plant hunting (researching) to find what I would want in my own garden. What a great idea to look around the neighborhood. BE sure to look up their growing requirements like sunlight, soil type, and soil moisture, and match them up to what you have around your garden, grouping similar need plants together.
A looks like Forget-me-not/Mysotis
Is E a Nigella?
C might be Candytuft/Iberis
Learning never ends because we can share what we've learned. And in sharing our collective experiences, we gain deeper understanding of what we learned.