I had a MBP for a little more than a year but just sold it because of money issues. I also wasn't happy with its performance in Leopard, nor did I use the extra capabilities. A situation just arose where I could get a MB for cheap, so I bounced. I never used the extra capabilities of the MBP, I have no firewire devices, I have a 360 so the video card wasn't very useful, and the screen was pretty crap too (my replacement IBM X31 had a better screen!)
Also, the inability to easily upgrade the hard drive was annoying. I did upgrade it myself, but it was a longer process then I was hoping for. And for spending $2k on the machine, I was extremely disapointed with the build quality. The "chrome" on the latch had worn away, the power button had recessed a little, the spacebar constantly had problems working, and the lid would not shut. Of course, when I went to Apple to fix this, they said they wouldn't
I wanted to get a MB before they replace it with another crappy aluminium one, since I trust the ability for plastic to hold up better and don't trust anything first edition from Apple either. I was going to just build a desktop, but I like being able to use my computer at the same time as watching TV (was going to use tv as monitor), and I don't have a good place to put it in my flat.