Portability is a convenience, so while I love PCs for their ability to be more customisable, and less limited (in terms of specs), than a laptop, I like being able to work whenever, wherever.
I agree, my favourite is also the PC, it may not be very easy to transport, but many files sit much more comfortably because the space is quite significant when you compare it to another device like the laptop, a smaller, transportable version of the mainly used PC.