I used to be really into Tech Death last year, I still kind of am in a way. I like Necrophagist, Obscura, Braindrill, Blotted Science, The Faceless, Cryptopsy, Nile and Origin - I find Origin really hard to listen to, they get really dull after a few songs.
Your thoughts on TDM are pretty interesting, I think that one of the main reasons I like TDM is because of the repetitive aspects in songs. Like I know I'm always bound to hear sweeping, legato, tapping, groovy fretless/fretted bass licks, odd time signatures, string skipping and blast beats whenever I'm listening to a Tech Death song. I guess its just the way those techniques are so overly used in the TDM realm. 