good question!
depends on the style your doing, i'd say, but loads of (harder) Techno seems to rely on offbeat emphasis, instead of real basslines.
i think loads of people either just use somwhat eqed kickdrums to generate their basslines, like
kick 1 (normal): x---x---x---x---
bassline kik : --xx--xx--xx--xx //so two x before every real kick
adjusting the velocities of the bassline kicks and maybe highpass (say 100-300 Hz) and that creates a running feel.
you can do stuff with sine waves as well or 808 kix (pretty much the same), this is something that is often done in jungle.
you can easily create basslines using perc loops and then filtering them down (lowpass+res) that makes basslines in no time.
i have found u can do cool stuff with tom sounds etc. as well.
don't forget a helluva lot of tech you have listened to has been treated (abused? :lol: ) with waves maxxbass.
just some ideas, hope they help.