Please improve using the keyboard (arrow keys) to move through text

I'm a keyboard addict. Partly because my wrists and fingers don't like working with a mouse.

Using the cursor keys to move through text on a page, is highly frustrating.

For example, the text cursor disappears when using the down arrow reaches the end of a bulleted list.

Another: using the down arrow often moves the cursor to the end of the last line in a paragraph/block before moving to the next paragraph/block. This is unexpected and breaks my flow.

Third: Using the right arrow at the end of a paragraph/block does not move to the beginning of the next paragraph/block. Analogously, using the left arrow at the beginning does not move to the end of the previous.

There are other examples, but the above are what I've experienced most frequently.