As someone completely new to cycling (like, 2 months) and who has a swanky vehicle as well, I've had the same conversation with myself every time I thought about riding to work but feared the weather report for the trip home. My first ride in the rain was fairly miserable, mostly because it was after a 9 hour work day, pouring rain, cold, and no fenders. When I got home my number one priority was getting out of my soaked clothes and doing nothing at all.
But the other day when I was riding the Montour and I got caught in the rain, there was a period where I was totally alright with it. I was exhausted, but didn't mind the rain. I think partaking in inclimate outdoor activities is something you're capable of, like a few of you have said, when you're prepared for it (fenders, raingear) but also when you love what you're doing.
The more I ride my bike the more I can say I really love it, and I know the more I love it, the more I won't mind when its not the best time to hit the pedals.
Also, the beast: Being in a canoe/kayak when its raining is such a great experience. [warning: zen rant] Theres that joke that goes "Two fish are in the sea. One turns to the other and says 'What's this water thing people keep talking about?'". When you're in an every day situation, you're surrounded by elements than you wouldn't normally see or appreciate, but when you're above a few feet of water, with water coming down on you, the humidity is rising, you can hear the raindrops, feel it, taste it, smell it. Suddenly you're glued to the planet.
Alright, I'm done.