Well, I've never been a fan of bump mapping (hence the lack of them on mine), or even beveled textures, mainly because it takes a lot of time and effort to get them just right or they end up looking cartoony/cardboardish. I think Khaliban's is the only one I've seen that got the bump mapping accurate to how the big E looks onscreen without overdoing it. The Constitution's raised detailing isn't easily seen until you're practically on top of the model anyways.
I *might* have a Miranda and Constellation in the works....