I decouple opamps with 0.1uF Röderstein 1837 MKP and 1nF NPO-COG ceramic.
Sometimes is use aditional 100uF to 330uF elcaps from Nichcon KZ, Elna Simic2 or Pannasonnic FM. I do also a 0.1uf from the plus to the minus supply locally. Sometimes this single cap is all that´s needed.
Multilayer ceramic (aka monolithic) are often used in digital circuits due to tiny size and excellent high frequency characteristics.
Audio seems to favour 100nF MKTs, sometimes coupled with larger electrolytics as space allows.
'Metal film' and 'polyester' are two different aspects of a capacitor construction (conductor and dielectric) rather than capacitor kinds in their own right. MKT type capacitors are made from metalis(z)ed (aka metal film) polyester.