- UNIX terminal. Good for programming. grep, vim, less, and all that useful commands are available from the console. Windows console is just pure trash, although there's Cygwin which helps out a bit.
- Easy to install/uninstall apps. Compared to Windows, Mac wins. Drag and drop to your Application folder to install, and delete to uninstall. No need to mess around with Registry or Add/Remove Programs (which takes forever to load if your PC has had tons of updates and apps).
- Unintuitive shortcuts. Copy is ⌘+C and Paste is ⌘+V. You have to awkwardly curl your thumb to press the command key. Home and End doesn't actually take you to the beginning/end of a sentence, rather it does nothing. Try it on Safari. click on the URL, and press Home. Nothing. You have to press two keys: ⌘+Left or ⌘+Up, but to move one word left and right, you use Alt+Left or Alt+Right.
- Finder isn't as good as Windows Explorer. Finder has four views: Icons, Details, List-Columns, and that iTunesy Cover Flow (which is totally useless for document files, btw). The only slightly usable one is Icons. Details is useless as it has this collapsible tabs that confuses you. If you highlight one folder a couple levels deep, and Paste a file, it actually pasted it to the parent view, rather than that folder you selected.
Not to mention that to delete a file, it's ⌘+Delete!! Just delete doesn't work. And to open a file it's ⌘+Down, not Enter. Horrible.
- Fan view in the Documents and Downloads folder in the Dock is just totally useless. That's the first I do to any new Mac installation, remove Downloads and Documents folder from the Dock. I'd rather access them from Finder.
- You can't maximize your Finder window to fill the screen. Pressing the green + icon only changes the dimensions. Not sure what the logic is behind this strange behavior.
Overall, Mac seems to be optimized for mouse users, and people who don't mind the fancy animations of their UI popping in and out of screen -- easy to wow the general population with. Programmers tend to like something that's more snappy and keyboard-friendly.
Linux would've been that nice middle ground: UNIX console + Windows shortcuts + snappy + customizable like PC, except that it doesn't have Office, Photoshop, and Lightroom.