If you find the sheer number of people too much, do visit either Himachal Pradesh or Uttarakhand! You will find THE kindest people there. Though be careful of leopard and bear attacks in Uttarakhand right now!!
Oh, I just came back from Shimla actually. I stayed in Narkanda for 2 days to do some hiking, and Shimla one day, though I didn't interact with many people there. My next stop is Kochi, hopefully things are also a little quieter there.
Make sure you try to talk in English and see. Most people should know or atleast understand english there. And Kerala food can be spicy and it's hot out there. Make sure your drink enough water and stay hydrated.:)
Kochi is also a very nice city, but if you're coming from Shimla or even Delhi you're going to find it sweltering hot probably. It's about 26⁰C (80⁰F) right now... (I'm close to Kochi and honestly in these temperatures it doesn't even feel like Christmas)
Ps, Kochi can be quite bustling. The more remote and rural towns (like Munnar) are a relatively safer bet.
