Me, I will never own a Mac anything. I will also never own a laptop of any kind.
Damn MSIE 8.0 ate my previous response to this... hint - use compatibility mode when visiting these forums with IE 8.
Skuzzy, I assume that's your answer because you've never NEEDED a laptop. For reasons I won't type in a second time (damn MSIE 8), I have found that I need a laptop for both personal and official business use when I'm on temporary duty away from home. To make it so I don't hate every second I'm using the laptop, I buy really high quality laptops and keep them until they no longer do what I need them to do.
Philosophy - there are 2 ways to buy a laptop if you're going to be using one a lot.
1. Get a really good (probably expensive) laptop, and keep it for many years. This usually means that after a year or two your laptop has old or semi-obsolete components, but if the overall quality is high enough you really won't care. Case in point is my T-41p. It still runs winXP, linux, and win7 great even though it's only using a single core 2.0ghz pentium-m with 2 gig ram. I upgraded the optical drive to a dvd burner (not even available as an option when I first bought the computer), I have upgraded the cpu from the original 1.8ghz cpu, I added more ram, and I'm on it's second hard drive. But the screen still looks great, the vid card still runs most DX9 games just fine, and overall it's really been a great investment.
2. Get a cheapo laptop and replace it every year. This is a great option if you aren't really into maintaining your computers, either software or hardware. You can get some really nifty laptops for about $600, and you can replace it yearly for 4-6 years for the cost of one really high-end laptop. That way you always get newer technology, and you don't have to worry so much about the thing breaking out of warranty. You only give up minor performance hits compared to other brand-new laptops and it probably won't be super thin/light, but most people don't really care about saving that last half pound of weight from the laptop case. You also won't have to worry about replacing the battery... When the battery goes bad instead of buying a new $100 battery you just get a new laptop, hurray!
Most people are probably better off going the cheapo laptop route, replacing as required. My personal choice of using option 1 is that I have some requirements that are rarely found in cheapo laptops. I require a decently fast HD, need the thing to be light enough to haul around on business trips, and want enough graphics horsepower to run anything I might install, games, CAD software, whatever. By the time I get the features I demand, I'm usually well over $1500 so I might as well get a really nice laptop and keep it for a long time. That's why if I was buying today, I'd get a macbook or macbook pro. Those have really nice hardware specs and will run any OS you care to install using bootcamp or virtualization.