Hi Jerry
Blimey, I think question 2 could be a tricky one for anyone to give you a satisfactory answer.
It is hard to say which well known dishes would benefit from some green chilli from those for which it has become, or evolved into an integral if not essential ingredient already.
I can only recall at the moment 2 dishes that have sometimes been served with green chillis and sometimes not, these being a Karahi and Rogan Josh, where personally I think it does benefit from the inclusion.
In fact it is likely any dishes with whole pieces of things like tomatoes, onion or capsicum would likely benefit from the addition. Where as creamy or sweet-ish dishes I think it would likely be detrimental. Surely it would be worse than awful in a butter chicken dish for example?
Not sure if my reply was of any help at all...
EDIT: Having thought about it, and made myself extremely hungry! - I reckon that some thinly sliced green chills would be especially nice with chicken tikka and bombay potatoes

Cheers