What is the best kind of techno music?
There is no such thing really. Like other artistic output, its a question of taste. I suggest you listen to a variety of artists and see where your taste & ears take you. You should be aware that there are artists who go under a number of guises in this field, to allow them to release different styles of their personality or character, amongst other reasons. There is also a colossal amount of BS and just plain awful noise in this area, as technology has allowed any pin head to create a record and pass it off as music. There is also a huge amount of sub-genres/styles which you can view by the “flow charts” at http://www.di.fm/edmguide/edmguide.