Well, these are mainly questions.

So, if I get bumpmap and use it, will my textures look better instantly?

Or someone have to make some artistic things with them?

also, is there any chance of adding files into my custom folder so I can see preview, and make decision if bumpmaping myself will be worth?

Also, could someone give me nick of a person who uses bumpmaped set?
Id like to see how does it look like