To me, it's about having something special, even though 90% of people don't appreciate it. It's the sense of keeping something going that, in today's society, should be scrapped because it's too old, un-economic, poorly built etc. etc. It's the obscureness, something different. They are fun to drive, the sideways action, 50/50 wight distribution, comfy seats. The simplicity! i wouldn't be able to do half the tings i've done to my 300 on a modern car mechanics wise and the lack of ABS, traction control, automatic wipers, parking sensors, gps dashboards, airbags etc. etc.
Some days i wonder why i bought it in the first place or why, after that, i decided to tinker with it, sometime i think i should just scrap it and get a modern thing i can afford to run. but, then you look at it, sit in it and you realise you are glad you bought it and tinkered with it. Those conversation's with old people ' I used to have one of those'. People who look and point at the side of the road. Even the boy racers who drive past in the college car park and point at it to their mates and laugh because its an old volvo and is utterly worthless compared to their 1.1 citroen c2 with black wheels and an oversized exhaust - That still makes me like my car.
in short, i'm probably mad

'88 360 +T LSD - sold
'87 760 TDI (D24TIC) - sold
'04 V40 D sport (F9Q, decat, Remapped, launch control)
'89 740 SE (b230ft, 12psi, V-cam, headwork, 'remapped', banded steels)
'86 340 DL 1.4