For me the biggest part was having a place to change. I commuted rain/snow/shine for almost 2 years straight in Chicago, but I was only able to make it happen because I had a gym membership in the building. Some places around here are (supposedly, so I hear) getting better about having more of a locker room style bathroom to allow for people who ride to work and not be a sweaty mess when they get there.
For about four years I did bicycle commuting year-round, rain or shine (no snow here). It was only possible because I had an indoor place to store my bike, a place to hang my clothes to dry, a place to change and wash up a bit, and space at work to store things like dry shoes and indoor jackets. This allowed me to just accept the weather and completely change between biking at work.
Now, I don't have that luxury. I don't have a good place to store things, I don't have a good changing/cleaning area. I'm dreading the rain.
Yep, just keep vigilant on the routine maintenance and at least store it indoors so it's only outside while you're riding it.
The scrappy-looking dependable workhorse also has a side benefit of you not having to worry as much about it being stolen vs. something that still shines.