Negative 1: Finder

This is also quite obvious for Win-to-Mac switcher. Macintosh software pieces are usually very well integrated into each other, but that is fact you cannot deny - Windows users do a lot with Explorer, and they miss these features until they learn how to do these things on Mac. Mac way to navigate through File System is called Finder, and while doing many cool things, it is not able to make Cut&Paste (Copy&Paste only), and create new files on a Desktop or some folder. In Mac, you should at first open application that creates files of some kind, and only after you save new file in this application, it will appear in the folder you want.

Another thing which is a bit problematic and unfriendly for recent switchers is folder viewing modes. While Column view is (arguably) more convinient alternative to TreeView never seen on Windows, Preview-like mode is a disaster. Finder don't generate Image thumbnails "out of the box", you should do some trickery in Finder's Preferences to achieve that, and while you have control on thumbnail size, the result is not that visually appealing comparing to what you have in iPhoto.

Any switcher is instantly tempted to search for Finder alternatives that would let him feel more like home, and there are some, both free- and shareware. Googling for "Finder alternatives" returns plenty of links to software reviews, and it is obvious that there's no just one that would suite everyone. From all of them I liked PathFinder more than others, although I am not in a hurry to buy a license after 21-day trial period is over, prefering to start thinkg more in Mac way.

Mac purists say that PathFinder has too much bloat in it, but I found most of its features quite usable, starting from iTunesStore-like path bars and iPhoto-like Preview mode to "Program Files"-like list of applications available from an icon on Menu bar and special area in top-left corner of PathFinder window where you can drop all kind of files and objects (this reminded me image tray paradigm used in Picasa, Windows-only counterpart for iPhoto - in my opinion, the killer feature). But of course, this is a matter of taste which Finder enhancer you install on your system, if any.