Commuting every day, so the brain’s now re-programmed and I don’t look at any weather conditions and think “that doesn’t look like riding weather” because, if it’s Tuesday then that sure as heck is riding weather, so it still is on a Sunday. The only weather that will stop be is freakishly high, gusty wind or, depending on where I was, lightning.
Thinking back over it, the most memorable rides over the last year, that have left the biggest grins, have generally been the ones with strange weather.
EDIT: The other positive advantage of going out when others might not is that the trails are a lot quieter.