Even though my last Mac, the early 2011 15" Macbook Pro, was a complete lemon in terms of execution (GPU overheating issues), I loved that design and form factor. It had all the ports I wanted, plus the end-user expandability. At one point I popped out the optical and stuck in a second SSD.

Apple didn't handle the recall for the 2011 MBP problems very well.

This was incredibly problematic for me, considering Apple's fantastic reputation for customer support. After that experience, I basically went back to Windows, and the transition was surprisingly smooth.