When I travelled in Vietnam, I actually found my Canon FD 85/1.8 very useful. I got some great, natural people shots with it, even though I'm generally not a fan of teles. I carried it, a 24mm and a 35mm. A great travel kit, I thought. Now I'd probably go with my Bessa, 25/4, 35/2.5, and 75/2.5.
It's funny about what you say concerning people in India not liking having their picture taken, Tom. My experience was just the opposite - I found people often asked to have their picture taken, which led to me burning through quite a bit of film, sometimes. Perhaps it's different in different parts of the country (I was mostly in the west).