I think a bike commuter needs to define what bicycle commuting means to them. Once I determined I was a full time no matter what commuter the decision became easy. Although, execution wasn't always ideal. For me, having the bike and appropriate gear ready the night before no mater what the next day's weather is going to be is key. If all I need to do is hop on the bike and go, then all of the other "stuff" kind of works itself out. It all depends on how much "stuff" you're willing to deal with. I personally feel all conditions (aka stuff) can be accommodated with attitude and gear.