OS X :: Assign Expose And Spaces Hot Corners?

I was first going to post this on the Community boards since this is more a geek opinion thing and not a technical thing but I'm putting it here b/c I noticed the Mac OCD thing here, too. Okay, so every once in a while, I decide that some aspect of my interaction with the UI is inefficient and annoying. Usually, its a very minor issue and my attempts to be less inefficient end up becoming ridiculous time wasters. Like my latest attempt to retrain my brain for what I think is "efficient" hot corner assignments:

Upper Left: Show Desktop
Upper Right: All Windows
Lower Left: Dashboard
Lower Right: Spaces

Here's the way I figure it. Show Desktop is the one function that leaves the almost all elements of the UI intact, particularly the menu bar. For me, the most inadvertent activation of hot corner elements is the upper left, because that has the menu elements I reach for most often. With Show Desktop, this matters much less. Spaces and All Windows need to be in adjacent corners for quicker consecutive activation because I use them in combo to move stuff between spaces and applications. The distance between top and bottom is shorter than left and right so these go on the right side. Which leaves Dashboard on the lower left which is good because there's nothing in the lower right corner I reach for on a constant basis. Dashboard widgets are arranged so all of my drag and drop widgets are on the LL corner. Anyway, I've been driving myself nuts with this arrangement because I'm so used to my old assignments that I keep hitting the wrong corners. How long till I get used to it?