Why I likes:
1) It's fast... no explination needed... right?
2) There's not many skins on the site.
Explination:
Other sites just don't seem to get this. Maybe it's just me, but when I see 8000 skins available for one app, I feel like a deer looking into oncoming headlights. I just tried this on another site. I noticed that there were very high-quality wallpapers there, but I got to preview like 3 out of 5000 in 5 minutes. I slinked off back to wincustomize, hopefully unnoticed.
At that other site an "outstanding" skin would get like 300 downloads. Here a "good" skin could get 3000. As a skinner, this was my frusturation with DM.
Moderation is fine. Unloading skins with less than X downloads (rating) after Y days is fine. Saying we'll only keep the 100, 500, 1000 best skins per app after X days is fine.
Just keep the site lightweight and fast with the latest and greatest stuff (it doesn't have to be mine), and I'll be happy.
Tony