It sounds like what you are describing is typical of pigment inkjet "glossy" printing ... the ink is sitting on top of the paper and thus isn't perfectly smooth. It is still "glossy" in that it is reflective and shiny, but isn't as glossy as a dye printer which absorbs the ink and thus is smoother.
Newer epson models exhibit this problem less than the 4000 (changes in the ink), although you can still see some depth variation of the ink if you look at it from extreme angles. Some papers are also better than others at achieving gloss.
With pigment printers there really isn't a way to get that mirror like surface that you can get with chemical based printing like Fujiflex, Kodak Mettallic or Cibachrome.