Well I have been a nurse for 5 years doing 12 hour shift's. I have found 2 types of shoes that I rotate between. The Dansko's are a really great nursing clog, a little getting used to is in order as they are a bit heavy. But once you get used to them they are great.
The next shoe is a fairly new one for me. I like the scketcher's shape up's. Again a little getting used to is in order b/c of there shape but they are awesome.
Another thing that I would recomend besides the shoes is having at least 2 different pairs to rotate between, wearing the same shoe for a long periods of time no matter what type of shoe will cause your feet to hurt.