"I'm all for paying attention to your car/gauges but honestly if you overlook this it could have dire $$$$ engine consequences."
That's the same reason I made mine automatic, too. I never want to casually glance at the temp gauge (semi-accurate, though it is) and suddenly find that it's pinned to the right because I forgot to look earlier and turn on the cooler fan. I don't have to turn on the cooling fan in my daily driver, so I don't in my Speedster, either. At less than $30 USD, it's really cheap security that I never think about.
Besides....... I'm getting forgetful as I get older. Now where the hell is my 10mm wrench?