I don't think you really have to worry too much about it, as said above, just go with what sounds good to your ear. I'd hazard a guess that the majority of techno records are produced by ear, not by referring to any preexisting scales or modes.

Having said that, I personally think that learning about music theory - and the subjects that tend to naturally follow on like acoustics, and certain bits of music philosophy - is a fascinating thing to get into in its own right :)