Whats important for you in a Laptop?

[Semtax]

Ive never owned a laptop before and before I dive in and buy one without giving it enough thought I was wondering what do you find important in a laptop?
And for a complete novice laptop user like me what do you think is easily overlooked in a laptop purchase, size, weight, gaming ability, keyboard, screen etc.

At the moment I have a PC which I use mainly for gaming, music, some rendering and an iMac for work (adobe suite stuff).
The bulk of my work i will do on these machines so the laptop doesn't have to be a powerhouse by any means.

The only main constraints I have is to keep somewhere around the £1000 mark, sub 15inch and have it look somewhat professional.

Any thoughts much appreciated

 

[Semtax]

Thanks for your thoughts guys. So far I have to agree with the portability trait.

I decided to go on a scouting mission to see a few laptops in person.
I got a lend of 2 laptops (Lenovo thinkpad 15, Dell inspiron 1520) from a friend and checked out the local computer store to see a few more.

First thoughts on the two laptops i got a lend of.
Inspiron = Not for me. Too big and cheap feeling (it was cheap after all). Seems like a family Laptop.
Thinkpad = Much better than the dell. I think the screen is 16:9 which I dont like at all though. Heavy too.

The range of laptops in the shop wasn't great, they seemed to have a lot of sub £600 ones on display and nearly all of them looked/ felt cheap especially typing on them.

Of the Mackbooks I looked at the 13inch Macbook Air really impressed me. Much nicer keyboard and trackpad than any of the Laptops on display and feels solid for such a thin thing.

Havent yet tried any expensive Alienware / Asus / Toshiba Laptop. Would any of those brands hold up against a Macbook feel wise?

 

[Semtax]

Still checking out laptops here

The keyboard and screen have become my main gripes with the laptops I have used over the last few days.
Got a lend of a year old Sony Vaio today. Seems a bit geared towards multimedia use and the screen is no where near as sharp as my monitors. Not a bad machine at all but dont think its for me.

The latops i have it down to are either some kind of high end portable Lenovo or Macbook air 13".

Has anyone tried an Alienware m14x?