Initial Z issues that are now non-issues......
 

The dreaded blind spots, with the mirrors set properly are much less of a problem than originally thought to be. The clicking noise in the rear hatch area has been explained as coming from the cats and quite normal for Nissan. After a few thousand miles, the unusual fuel guage is acceptable. The low ground clearance can be dealt with if you are constantly conscious of the front spoiler. I'm sure there are others, but these are a few I have dealt with.

This probably applies to everyone but I got so used to driving the Z that it's almost impossible to drive anything else, no matter how friendly it is to drive. For example, I drove my friend's E350 and I had so much issues with changing lanes and its size.