1) No run command in GUI to access a Folder: Use "Go to folder" (But still no globbing, you have to use the terminal if you want auto-completion.)
2) No "Cut" in Finder: Use "Cut" (from main menu, shortcut, or context menu – it even has undo)
3) Maximize doesn't work: It's not maximize, but zoom. Apple changed this behavior with System 7 (in 1992, if I remember this correctly), when 9 inch monitors became obsolete. The widget switches a window's size to minimum size to cover the entire content and back again.
4) Menu bar used as system tray: For a Mac user it's perfectly the other way round (Windows system tray is only exposing a limited view on the widgets – How do you work with this?).
5) Alt + Tab doesnt switch windows of same app: Use F9
6) Activity monitor sucks compared to Windows Task Manager: It's probably a matter of taste (having more items in a view or just a few of them with nice graphics). Does Task Manager have something like "Sample Process"?
7) Multi monitor is a joke: Not really, in fact full screen mode is the joke ;-)
8) No Windows "Aero Snap" equivalent: beware! IMHO this doesn't work well with the Mac's user experience. (But this is a personal view and a few third party add-ons are proving that there are at least some, who feel different about this.)