I wanted an ultrabook-style machine, i5, 4gb of ram, no cd/dvd drive, ssd only (no hybrid), decent screen res (1080p s a bit too big, 1600x900 is spot on), and most importantly a great keyboard. The x1 carbon was the only machine I could find that matched my specs, it has the best laptop keyboard I have ever had the pleasure of typing on. Highly recommend.
EDIT: The X1C has the first trackpad that I actually enjoy using, I usually have trouble due to sweaty hands, but so far this trackpad hasn't had a single problem and I have been able to get multitouch gestures working via synaptics.
If I had to think of negatives it would be the lack of ethernet/vga/hdmi without adapters, but at least they use 'standard' adapters (display port->hdmi, usb->ethernet).
The X1 carbon is the first laptop where I enjoy using the trackpad. It is odd for me too. I still often use the trackpoint, but for scrolling around web pages I often end up using the trackpad (sometimes with the trackpoint buttons which are right above it).
Toshiba and Thinkpad seem to be the only vendors that seem to still include trackpoints.