You don't actually melt it but it tastes much better if nice and runny. Real French camembert is made with unpasteurised milk, which makes all the difference, but very hard to come by in this country these days. 'Elf'n safety, you know.
Feta cheese,VERY strong cheddar....brand / make / region does not matter...it just needs to knock my socks off, Shropshire Blue,'bocconcini'-mini mozarella....M+S do a gorgeous one-melts in your mouth.