Zimmer is very accomplished at his technique; he uses it to great effect. I was hoping that his Last Samurai soundtrack didn't sound as similar, though. It is a similar movie to Gladiator so maybe he was told to provide a lot of these elements again (solo vox over pedal tone, ethnic perc, etc.). Then again, he uses these techniques a lot anyways.
Whenever I sit down to write something towards this end of the spectrum I usually end up listening to JW's Seven Years in Tibet after Zimmer, Eric Serra, even David Arnold, etc.
I find it very difficult to write with electronic timbres mixed in to something that is supposed to sound symphonic, so I have to hand it to Zimmer and his team for successfully blending the two. Years ago after hearing Broken Arrow I went and did some work that sounded like that for some industrials; that was fun and in the end quite appropriate, but nowadays that stuff just comes off sounding cheap to my ears. Especially Point of No Return (ugh), or Serra's La Femme Nakita. So I suppose that I'm biased because this 80's sound has been done to death. Granted the newer stuff sounds better because there's more real orchestra in these soundtracks (like Serra's Fifth Element, which I really like) but when someone requests instrumentation beyond extra ethnic flutes or percussion (rock guitars, rock drums or electronics mostly) it is tough for me to sell my own ears on it.
Clark