Horses for courses, Kev.
I've always been into cars and tinkering with them gives a great sense of achievement, whether it be simple maintenance or modifications.
For what I've done to mine it's totally been worth it. I'd wanted a Mk3 Clio for about 7 years until I'd actually been able to buy one outright. I can't really afford to change it, so definitely won't be ragging it senseless, let alone be able to replace it if my ambition was greater than its physical adhesion!
I certainly drive it in a spirited fashion (gf always rolling her eyes at cornering speeds) but enjoy it as something I've finally achieved. Every little thing I've done, and will be doing to it, will be absolutely worth it because I enjoy the car so much. I'd say the biggest cost was the Recaro's but worth every penny, they just 'make' the car and I feel special every time I fall into them!
Every time I get the Mk4 itch, there comes a time where I park it up, glance back and fall back in love with the awesome styling it was given.
So all in all, worth every penny and deserves care and 'abuse' in equal measures