Some enchantments are Ok, for example if a weapon that isn't usually automatic is automatic that could kinda be that the weapon was sort of tweaked a bit, or just minor bonuses, or even ones based off of targets HP(Could be part of the design)
The Flaming, Freezing or Explosive ones are just plain f*cking stupid. Horray, exploding bullets!, even the ones that target specific creatures, or do more damage at night are a little stupid.
What's really shitty is the Shem Drowne Sword. A sword from the Revolutionary War that deals Radiation damage. WTF is up there?