I agree that dragging a volume to the Trash to unmount it seems odd. To be honest, I immediately thought that was a Classic thing, and then remembered OS X does it too. That shows how often I use that approach, then!
Like fryke, I tend to use keyboard shortcuts, or else I right click on the volume and eject it from the contextual menu. While I still agree that it is a counter-intuitive way of doing things, doesn't the Trash icon at least change to an eject icon when you drag the volume over it? (Better than nothing, I guess.)
Also, I have to agree that the Windows way of handling removable volumes, such as USB flash drives, is rather cumbersome compared to the OS X way of doing things. Under OS X, I plug it in, it mounts, I use the drive, and then I use Command-E/Command-Y or right click to eject the device, and then I physically unplug it. Under Windows, I plug it in, Windows often searches/scans the device, then asks me how to handle it (eg. Explorer window, etc.), and I get access to the data. When I'm done with it, I go to a small icon, left click on it, then click on the device to remove, and then unplug it. It's not rocket science, no, but it seems unnecessarily cumbersome, when the comparison is made.
As for resizing a window only from one corner, yes, sometimes it would be nice to resize from other edges. On the other hand, there are times in a Windows environment when I think the opposite way round and think it would be nice to be able to drag windows from edges other than the title bar.
I have to disagree about the Dock vs. the Windows taskbar, though. I think the Start menu is counter-intuitive (for instance, one goes to "Start" to "Shut Down!"), and the taskbar seems cluttered, to me. The taskbar contains the Start menu, the "Quick Launch" icons, and the "notification area" (on the right). So it contains a range of items, some of which are relatively fiddly icons, rather than having a clean theme to it. It also annoys me that I cannot, to my knowledge, easily rearrange items in the taskbar, as sometimes the order is not very convenient for me.
Also, I find it much, much easier to recognize different applications and documents in the Dock than in the taskbar. If I had, I don't know, ten applications open in the Dock, I could easily see them and switch between them. If I tried the same under Windows, the taskbar would become very compressed and the items impossible to read, plus items might move to another level of the taskbar, effectively being "hidden." I also like the way OS X displays a preview of documents in the Dock, it makes it quicker to recognize what one is after. I also prefer the way one can keep applications to hand in the Dock, as a quick method of launching them, when compared to the Quick Launch icons in Windows.
It may just be we are used to different approaches, and so our opinions differ as a result. I think there are some inconsistencies and quirks in OS X, but that it is much, much better thought out overall than Windows, and I feel I am much more efficient using a Mac to do the same tasks.