IMO, rolling on those charts is optional. In effect, the %'s show how common the magic items are in Greyhawk.
Since the Glowing is an option, some settings may be higher or lower depending on the priorities of the mages making the items.
If it makes sense or makes for an interesting item, then I'll have it glow. Otherwise I don't.
Actually in general, I don't believe in doing anything that doesn't add to the enjoyment of the game or benifit the overall story (and thus, the enjoyment of the game).
Since the Glowing is an option, some settings may be higher or lower depending on the priorities of the mages making the items.
If it makes sense or makes for an interesting item, then I'll have it glow. Otherwise I don't.
Actually in general, I don't believe in doing anything that doesn't add to the enjoyment of the game or benifit the overall story (and thus, the enjoyment of the game).