What temperature do you feel most comfortable in? What temperature are you most productive in and like your home to be at?

For most people, it's around 22C or 70-74F. But it varies a lot. Some people are most comfortable when it's as low as 65F(18C), while others like it at 76F(24.5C).

Note:
C = (F - 32) * (5/9)
F = [C * (9/5)] + 32
If you're lazy or don't have a calculator, here's an online converter.