In OSX you can only resize a window in the bottom right corner, in Ubuntu I can resize from any corner, or I can hold Alt and middle click anywhere near a corner of a window to start resizing it. No more hunting for the resize sweetspot.
When I click the Maximize button on OSX, it doesn't actually maximize the window 99% of the time, it just picks a seemingly random size. I saw an app a while ago that would let you control how your OSX apps are resized when you maximize them, but if I have to buy an app just to make my OS do what it should do anyway, there's something wrong.
I need 10 different apps on a Mac just to do what I can do out of the box in Ubuntu. Nautilus can access Windows network shares, SSH/SFTP/FTP access, and can mount NTFS, HFS, and pretty much any other filesystem type there is.
On a new linux machine I can apt-get most anything, but if I do need to compile something I just apt-get build-essentials and I'm ready to go, on OSX you have to download a DVD just to be able to compile stuff from source.
I just want to see hidden files in Finder, why is that so hard? Why do I have to google it and use a 3+ key combination to enable showing hidden files? I'm all for keyboard shortcuts, I'm a keyboard man, but until I learn and memorize them, you should put them in the menu where I can find them with a little hunting.
And that reminds me, why can't I type a path in Finder? I prefer an address bar, where I can type a path to a directory I want to view, but noooo, I have to click around, and if it's a really deep folder I'm trying to get to I'm screwed.
I like Home and End keys. Where are they?
In the default Terminal app, there are no shortcuts (at least none that I could figure out) for moving around the text I'm typing quickly, like going forward and back a whole word, or going Home or End, you have to hold down the left or right arrows for a while.
Maybe for some people this locked down, dumbed down environment works for them. Maybe some people love learning the myriad of keyboard shortcuts needed to get stuff done on a Mac, but I prefer Ubuntu, I can get stuff done a lot faster and without wanting to kill myself.