At what temperature do you drink your beer?

I'm enjoying a nice Tottenham mild right now, and for the heck of it, I decided to see what temperature it was in the glass. (The kegerator is set to 42F, I just wanted to see how much it warmed up in the glass). 43.5 degrees Fahrenheit, according to my handy dandy digital thermometer. I know, I'm a beer nerd. I think that is perfect, because it will warm slightly by the time I finish the pint. Realbeer.com says it should be a little warmer.