I've observed a lot of SCHs (myself included) go through this progression:

1. What are macros?

2. Macros are sweet! Let's see how close I can get to "one press does everything!"

3. Macros are okay, but I think I have too many actions bundled together.

4. Macros are best for things like announcing rez and setting up mouseover skills; my gameplay is more flexible and more efficient when I don't macro too many things together.