Totally understand where you're coming from. I've even contemplated moving onto something else like an NSX or a 'vette, what with all the maintenance of the Supe as it reaches its tipping point. I keep investing in it to keep it sweet, and the love for it is becoming more and more jaded.
BUT. I know everything I do for the car is a positive thing - new wheel bearings, new rad, new suspension boots, new screen, new thermostat, new coilpack clips, etc. These things just breathe new life into a hunk of metal that I can look back at after parking and still be proud that it runs perfectly even after doing enough miles to circle the planet four times.