I'm on my third 350z, I just find sometimes i fancy a change for something totally different so end up swapping then I start to miss what I loved about the 350z and ended up getting another one. I am a nightmare when it comes to keeping cars but I do get so much enjoyment out of themI think sod it.
I did with a Civic Type R too, had 2 of those and enjoyed them both.
I've enjoyed every car i've owned, just different reasons for each and each car suited my current situation at the time. Certainly no regrets and when I told people I was getting another 350z they all thought it was daft to buy a car you've already owned but Im loving my 3rd Zed just as much as my 1st.