This circle-endpoint thing is really useful, thanks!
One thing that often confuses me:
If you choose the style of the start-/endpoint *before" you actually draw the line, at the first line the endpoint is unaffected from the setting.
It's not a big problem because with some extra clicking you can change this but I'm always stepping in that same trap.
This is what I mean:
http://screencast.com/t/P0zvq0GW