I've been running Windows Media Center (WMC) since Vista and have been on W7 for over a year.
In the past I've tried things like My Movies for adding metadata to my DVD directory but have issues with things like the .xml that replaces the .jpg's I've already put in there.
Currently, I use the vanilla WMC interface, other than the Heatwave and WHS add-ins I don't run anything fancy for my tv/movies/media.
What do you use? How is the spouse acceptance factor?