For floor varnish it's probably not refective enough, and it sort of ties in with what Vilters said about the bump, too much bump so your bump is probably making it look slightly duller or rougher than the surface should be - acting like a microsurface at steep angles.

That thread Baggins started the other day with that glossy wooden box, that finish, I'd say that's spot on for a wooden floor as well, absolutely spot-on.  He even had the orange-peel effect on it.  That's the sort of detail that makes all the difference with surfaces.  I'm going to have to download that material thing of his, especially after seeing that box, cause unless he used double geometry to get a thickness look to the gloss (and I doubt it), I have to know what he did to get that.