For me it's all about being mobile. But I also need a decent size screen. My first laptop was a 15" Gateway (given to me as a christmas present so not my first choice) that thing was so thick (that's what she said lol) and big I hated carrying that beast around. After that I had graduated high school and had my own money and decided to buy something I wanted. So I got a Mac went with the white 13" MacBook. Loved it. But that to was a bit big and heavy. So when I decided to up grade I wanted to go with the 11". My mom who was buying this for my birthday/Christmas (birthday is Dec. 26) asked me if I wanted the 13" version. I thanked her sand said no I didn't and I wanted everything in the specs I had given her. Then later my mom said that she almost got the 13" anyway but a friend of hers who is very tech savvy said not to and that I probably had a reason for wanting the 11" and yep he was right. I love how light and small the 11" without having to small a screen and still having a big enough keyboard to type on. I mean have you ever tried to type on those small netbooks you know the 7-8" little things they are hard and made my hand cramp. Anyway as you can see I kind of have a pattern of going smaller as I upgrade. But I don't think I would ever go smaller then 11" perfect for all I do.