I have a 40° minimum, glasses under a full face helmet tend to fog below that.
I ride a 1998 Honda Valkyrie up and down a windy canyon road on my 20 mile daily commute. While I could probably justify it in terms of economy or time, realistically I ride the bike because it's fun. Crappy day at work? 5mph faster around the corners and I'll forget all about it by the time I get home.
It's in the parking lot today.
