MacBook Pro(15") - hidden
iMac(20") - shown
I'll show it, but on the right side of the screen, and very small. On the bottom takes too much real estate.
Ditto. A part of me still wishes I can drop down the Apple icon in the upper left and have that replace the dock like the old days. But I'm sure the dock is still the better option.
I prefer it to be showing for two reasons:
[1] I can see at a glance what is running.
[2] What is faster:
a) Scrolling down near to the bottom of the screen and clicking straight the app you wish to launch.
b) Scrolling right to the bottom of the screen, waiting for the Dock to pop up, scrolling across to the app you want to launch (because it won't always be in the same place) and then clicking it.
I have tit fairly small (not tiny) and find it doesn't get in the way too much on my 13" screen.