I have 2 sautes, 2 skillets, 5 saucepans, and an egg white bowl. They're all about 25 years old, and I used to use them all the time. When I got divorced, I let him have the SS and I kept the copper.
Now I probably own 6-8 'sets' or non-sets of pans, and I almost never use the copper. It just sits on display and tarnishes. It's way too much work to keep it polished!
The one exception is a small saucepan. I always use it to make hollandaise. I don't use a double boiler, and when you make it over direct heat, it's real important to have the thermal control that only copper gives.
I guess I'm just too old to waste the rest of my time here polishing copper!