I hate rain from a detailing stand point. The car gets very dirty especially nowadays with the the whole metro bus project, and the whole week is scheduled for rain.
Cleaning the car after rain takes me atleast 3 hours, 1.5 - 2 hours being consumed only for tyres and undercarriage cleaning.
For this week, im planning to do a simple high pressure wash of the car without scrubbing or drying to get most of the dirt off making it easier to clean in the end.
I remember when i went to England a few years back, there cars used to get clean after it rained, they didnt seem to get dirty at all.