That's my current situation and as many others have said as well, the two-car combo might do the trick.
The M3 "wakes me up" every weekend when I drive it. It scares me, and it keeps me focused more than any other car that I have owned (16 so far @ 32 yrs of age; If you deduct my two company cars, this is one car for each year).
Modifying the cars, tailoring it up to what you want can help - but can also frustrate you.
I tend to have kept those cars around the longest, where I can enjoy driving so much, that eventually, I will mute all thoughts and "noise" in my daily life. The Mk2 GTI does that, the E39 Cruiser does it remarkably well, and the M3 does. All the others, I use as a tool (=daily workhorses) or sell.
But don't worry, you are not alone. Definitely not.