I own both consoles and it really came down to preference IMO.
My biggest problems with the last gen consoles was the over heating in both consoles (much more Xbox RRoD I suppose).
I also remember reading a long time ago that the reason for overheating (especially with the the launch/original's, and by this I mean the phat consoles) was all due to PlayStation and Xbox rushing their console launch date for the sake of Market share and who got their product out the door first.
I don't know if this is true or if I am just another crazy console conspiracy special but it does kind of make sense.
Anyone who bought the phat launch model (I am talking 2005/6 models) knows that they had serious overheating problems.
What do you guys think any truth behind all this?
Otherwise it was pretty much small personal issues for me:
Controller: Xbox over PlayStation (too small + triggers)
Online: PSN over Xbox Live (the one was free)
Camera's: Kinect over PS Eye (they were both pretty much rubbish IMO)