When I was younger, my writing space consisted of a pencil and a piece of lined paper. I refused to use pens because I didn't like making mistakes and didn't like how ugly it looked when you had to cross the mistakes out. As soon as I got my first laptop, though, my writing space changed to the computer. I discovered how fast it was to type and how easy it was to write anywhere I wanted to, whether it was my bed, on a beach, in the car (not while driving) or even in the classroom. It's a great writing space.
The ability to erase and correct mistakes in a matter of seconds is probably the biggest advantage of an electronic writing space. Speed is also a bonus, as once you get your typing skills up to a high level, you can write a lot quicker than printing and make it a lot easier for the audience to read. It's also helpful that when you are typing in a program like Microsoft Word, the computer is able to correct you and point out if you make a mistake. Paper and pencil's can't do that. But there are constraints to computers that make it harder to write. Even though it can point out your errors, the corrections aren't always correct. Computer's have been known to crash, which can provide frustration if you don't save your work. There are also many more distractions on computers, such as the Internet or games.
When writing on a computer, it's harder to think of your specific reader. When you write something on paper with a pen, you can picture the reader a lot easier. When you type something, I never know who the reader is going to be and what they are going to be looking for.