heh, i bet there will be a higher instance of tiler users in here, than the stackers... because lets face it, the vast majority of us started as stackers and weren't ever aware there were an alternative paradigm. and we probably got used to this from mac, or windows, which ironically in windows' case, started out as a tiling window manager!
a lot of the stackers simply wont even notice this thread. ... of course, in a place like crunchbang forum, it's surely only a matter of time before they find out. 
ok, enough pre-ramble, time for my on-topic ramble majoris. why i prefer tilers. 
in a word,
workflow.
(please dont tell me that's two words.) 
i do find myself going back to openbox every once in a while. usually just after a fresh crunchbang install, or when checking out the latest slitaz, or even sometimes when making custom distros for peeps. and sometime i just do it because the grass seems greener.
sometimes i tire of my close-to-default controls of my tiling window managers, which tends to follow a vi-like for-programmers layout, requiring two hands on the keyboard. sometimes, particularly when not particularly engaged, like when just leaning back, lazily browsing and maybe watching a video, or playing some slow paced top-down sim in the background... in these times, the stacking window managers have alure, because i can still have a drink or a sammich or whatever in my left hand.
but really, that is about the only reason i can think of that ever pulls me back to the stackers (and that's simply a matter of configuration really). eventually they show themselves to be clumsy fools, even the likes of openbox, as sanely configured as it is in crunchbang.
many [presumably] great ideas have been lost due to stacking window managers. in some frantic flurry of inspired ideas, i seek to get them into action as soon as possible, before they get forgotten in the hurbris of more ideas flowing in. with a stacking window manager paradigm, many a time, i've caught myself adjusting the window, and then the very next thing is: "*expletive* it! what was i doing again?..."
this happens far, far, far less in a well configured and effective dynamic tiling window manager, like xmonad or scrotwm (or "spectrwm" if you prefer).
there, window management just happens, and lets you get on with... with whatever it is yo uhappen to be doing. automatic tiling window management gets the window manager out of your way.
a lot of the time in a stacking window manager, you are likely just putting up with poor use of screen space, and overlaps of things you might prefer to continue to see too, just because it's not worth the time fiddling around getting everything in sight optimally, or you spend lots of time arranging your windows... and if you've spent some time with the tiling window manager paradigm, chances are you'll find yourself gravitating towards arranging your windows to maximise space usage, much like they would appear in a tiling window manager. ... so eventually you think, "might as well be using a tiling window manager".
i often find myself showing off to people, my scrotwm or xmonad, after it's been in use for a while and every workspace is populated with different things.... and, so long as i've kept things nice n optimal in my os, bloatfree, i should be able to just hold down the modifier key, and run my fingers across the number row on the keyboard, and a flurry of windows instantly changing flickers by, showing each, as good as instantly. 
workflow.
it's aided by responsiveness, as highlighted by my anecdote about showing off, but that's not all there is to the workflow boon. i dont imagine the boon to workflow is immediately apprent to someone coming from the stacking window management paradigm, since at first it might be offputting, the notion that there's more than one or two buttons with funtionality that interacts with the window manager, and they're not all on the mouse. ^_^ but stick with it for a week and it should have become apparent to you, even if you still might be a little clumsy with it at that point, but after two weeks, the workflow boon will be fully engaged. 
i love tiling window managers, because they are more clean, crisp and effective.
and also, here's a nice clincher...
these dynamic tiling window managers....
they have the ability to stack windows too!

so rly, why are you using a solely-stacking window manager? ;D
