Now, I use my macbook pro most of the time lately because it is very portable and I love the design of the hardware. It's just very easy to carry around and put on my lap.
That being said, I use linux on my work PC, linux on my HTPC (which is what my TV runs, I don't have cable, it's set up with a linux box to be a full featured media center plus video game console emulator plus computer), and I have linux on another laptop. I use Ubuntu primarily, though I have used Mint as well. The new Unity interface is awesome once you get used to it.
Now, admittedly, I spend a lot of time in the terminal because I do a lot of programming both personally and for work (and the same is true on my mac). I am generally either in a terminal or in a web browser. So I install programs from the terminal (which is actually quite easy), and I am also adept at installing software that you can't get in the software center or more advanced versions of that software, but honestly, you can get everything you need in Ubuntu without ever opening a terminal nowadays.
You can get video players, office software, photo editors (GIMP, which is very similar to photoshop), skype, thunderbird, firefox or chrome, audio players, audio or video editors, and much more from the software center with the click of a button.
As nerdyboy said, it is very secure and it is very good for networking, both in your home network, and for remote servers. For instance, my HTPC hosts several hard drives and shares a music folder with the whole house over the network, as well as a comic server. The Outhouse server runs on linux (CentOS), and the old OH server ran on Ubuntu. My work uses Ubuntu servers. I've also worked with Redhat servers.
I have linux on one laptop at home, and I begrudingly use it only to use the program ComicRack, but that's only until I obtain a Windows license to install a virtual box on one of my other machines. I can't stand Windows, hate it with a passion, and I think once you've used Ubuntu you will come to feel the same. It is just a clunky, slow, error prone, crash-heavy, bloated, vulnerable system that saw its best days in the mid nineties.
Get Ubuntu, give it a try for a few weeks and you will feel like a pro.
If you need help with anything, let me know.
I LOVE BLUD BLOOD! - Rob Liefeld