Most commonly used alternate UT maps online?

[Eug]

I haven't played for a few months but recently started again. However, now when I log on, many of the good servers are using maps I've never heard of or which weren't used much before. And I'm not just talking about DM-Bathroom, or TV-Store, etc.

I have installed all the bonus pack, including the last one with the skeletal chars files. Which are the common maps, and skins, etc. to install?