I've seen this being requested and turned down before, but I just wanted to voice my support for this.

The lack of option on the autohide feature is annoying. A simple field to set the number of ms delay for appearing/hiding would be useful to a lot of users (a few of them voiced it here in the past).
Having one bar at the hidden on the left of the screen is very handy, but I keep triggering it every time I reach objects locate on the left of a window. Then I have to wait for it to disappear, or I have to click somewhere to make it go away. 
Other locations of the screen are even more problematic: below is typically used for the task manager and other panel; top and right would be worst as this is were most windows have sliders, window bar, tabs etc..

Please, consider this feature.

Reproducible: Always