See, I, the exact opposite when it comes to Alt+Tab. At work I have to use Windows and I hate the fact that if I have multiple Windows of one program open I may have to Alt-Tab several times just to get to the window I want. I prefer how it is on the Mac where if I switch between to programs, both of which have multiple windows open, it'll just show me all the windows stacked on one another in the order they were used. To me, doing this then clicking into the stack to get the window I want is much faster than trying to see which window looks closest to the one I want using the Alt Tab icons in Windows. They're just too small for me and often multiple windows of the same program look exactly alike at the size Windows shows the previews. Same with the task bar on Windows. I hate clicking program icon and instead of just showing me the windows I have to once more hunt for what looks like the one I want before it brings it to the fore.

I've never used OS X With multiple monitors but I do use dual monitors at work and I can bet it definitely would be frustrating to lose a monitor just to have one app full screen. Hopefully they fix that. For now I'm good with Spaces. Actually I think Spaces are gone since Lion and they're something else now.