Let me start out by saying the ES Dropdown Menu module is even cooler than I originally thought.

I'm glad to see a native drop down login in a module.
The issues can be
seen here. Anyways this screen shot will sum up a few issues:
1. Login box overflows beyond template.
2. Language strings break outside ES menu items.
3. Direction is improper unless the browser is downsized a bit. Here's a sample where it looks better:
4. There is no register button. Ideally on the left of the login button would be a good place for it.