I don't intentionally ride in the rain, it doesn't matter how hard/long it's been raining; it doesn't even matter if the rain has stopped -- I don't cycle on wet roads. Of course I do ride in the rain because I'm a commuter/touring cyclist and get caught out in the rain a lot, but almost never start in a rain, unless I'm on a tour and it's day-after-day of raining -- you can only sit around for so long.
I don't mind getting wet, nor do I mind if my bike gets wet -- it's all about the road grim getting on my bike and stuff. I'll go for a run in the rain, but won't ride my bike.