Paranoia about the slightest squeak or warning buzzer going off for fear of the repair bill (that blasted frost warning gets me every time) but 12 months and no significant problems later the the paranoia has lifted and my mid-life crisis is well under control (although I'm a realist, the admiring glances are for the car).
I've also become a roadster weather forecast junky
+1 on the amount of time spent on this forum. It's become at least a daily thing and so much better than the FaceSpace or MyBooks of this world.
Only other thing that's changed is my every increasing range of hats.