They all taste pretty much the same to me but one I like to go to when I'm downtown (Zürich) is under the street in front of Hauptbahnhof Zürich . From the Apple shop take the stairs to go under the street and it's there at the bottom of the stairs to the right side.
There is a place called North Point (I think) near the tram stop for Sihlpost. A short walk from downtown. they are always warm and have a great spicy sauce. I will try to find the location on a map.
Directly opposit the Kanslei flee-market on Langstrasse, or so I've heard, but I have tried their kebabs which are almost the best in Zürich. Well, that's what I recon... for whatever it's worth
Josefstrasse makes Auslanders drool. A mother at my school sings the praises of the baked goods at an Italian cafe across the street from this lebanese joint which my lebanese grandfather has personally approved. On the Italian cafe side of the street is a mexican shop El Maiz of which I approve. Walking from these places toward the HB one passes a chinese restaurant owned by the ambassador of china