Every player worth their salt has memorized the magic item tables of the rulebook of your choice. Really, just ask them.
So, not only are weapons and armor with simple plus "ho hum", but so is just about every magic item published in a core book. They can recite the abilities of that Staff of Power or the Elven Cloak they just found once they ID them (and probably before as they pelt you with guesses).
Do you create magic unique magic items for your campaigns? If you do, is it there to add spice to the basics ones or do you replace all of the standards with unique items of your own design?