When you are looking for a mobile computer or laptop, what features in particular are you looking for? Do you prefer portability and small size, or computing power and battery life?

I used to be all about battery life, but more and more I find outlets available in the places I frequent, so it is less so now. Memory and speed are important to me, though, and I prefer a big screen to display what I am doing. I have bad eyes.

If I ever needed a mobile computer (whatever it is), I would go for the portable and small sized one. But currently I do most my work at home, so a strong, durable and powerful PC is all what I need.

I need lightweight, but with a decent size viewing screen because of my eyes. I also want speed. Battery life doesn't concern me because I tend to find connections as well.