I cook a lot. I feel I have whittled down my supply of things to be about perfect for what we need...not too much and not too little:
Stainless steel...
1 large stock pot
ETA: 1 wok
3 other pots in varying sizes
1 frying pan
1 griddle (my one thing that is coated)
1 cookie sheet (Though I would use 2 at once if I had another one)
2 muffin pans (When I make muffins I almost always make enough to use both)
Clear glass or white ceramic...
3 pie pans
1 long casserole dish
6-7 smaller casserole dishes in varying sizes
8 ramekins
I should just clarify, in case all the casserole dishes, pie pans and ramekins sounds excessive...every one of those things doubles as serving dishes and storage dishes for the fridge so they are all in constant use. All the ceramic pieces are white, so it goes well with my white correlle that we use for our daily dishes.