The more mature of the selection of Gruyérè you find in either Migros or Coop has become my cooking cheese of choice. It doesn't leak fat all over and has a great tang.

It's also fab-u-lous on crackers with pickles or dollop of Branston...

...or just generally snaffling a slice out of the fridge whenever the mood takes...

I don't bother trying to get hold of Cheddar any more.