I don't have too many Indians around my area, but there are a few, and for the most part they're really really nice. I haven't dealt with them as an ethnic group enough to deal with trust issues though.
There's like, 1 or 2 regular Indian customers that are too cheap for my tastes as a cashier at the farmer's market (Always asking for bargains and freebies >_>), but I know they don't represent the group as a whole.