The preparation of coffee is a science of its own.
You will find numerous suggestions on the list of reference books.
The brewing-temperature determines the coffee flavour. It should be below 99 degree Celsius. The softness of the water and the correct grind degree are also decisive factors.
Look over Thomas Liebe’s shoulder - how the Barista – Swiss master prepares coffee:
Here you find an interesting comparison between capsula systems and automatic coffee machines, produced by "Kassensturz" (Swiss Television).