I still own my XR4is and I'm getting an urge to finish the unregistered one, but it certainly isn't a passion like it used to be.
I walked away from a new ST200 when I still worked for Ford and was entitled to a very good discount, because the suspension was just too hard for me to enjoy day-to-day.
Since then, the fastest car I've had was either the Alfa 147 (yeah, right - not fast but very quick!), or the Vectra 3.0 CDTI.