Go with whatever you're comfortable with. Personally, I like them tight, but I also keep them tight for street skating and slides, and I don't bother with laces unless I'm preparing for a competition.
Edit: wait, no, that's not right. Loose is understandable, how are you sliding with them completely undone? Wouldn't that make certain slides much harder? Backslide, ern-sui, etc. are fairly taxing on your ankles, and the support of a cuff would definitely help with those.