Z3 Roadster (E36/7) To sell or not

Advice, input or suggestions sought.

Every year as winter approaches and I look into storage I have the same nagging question.

Q: Why do I still have this car?

The car - no major mods:
2000 Z3 M Roadster 42000 miles
Dinan Stage 2
Dinan CAI
Dinan high flow throttle body
Strong strut and Strong Butt
Plexi wind screen
OEM wheels
New stereo head and speaker set from Crutchfield

The drawbacks:
Only able to drive on weekends (2 kids that need pickup every day from school)
Additional annual insurance cost
Wife doesn't particularly like being a passenger
The thought of my kids asking for the keys when they are old enough to drive

The positives:
The sheer pleasure of spirited driving -obvious point I know
Doesn't hand like my Toyota
Convertible
Older style/less refined than Z4 - for me a positive having grown up with MGBs

So why do I still have this car? Should I just sell it and be done with this chapter? Keep it for another five years or so and keep adding to the modification list?

It's so impractical and so damn fun to drive!