The workings of magic
One of the things I dislike about some D&D settings, especially high-magic ones or "kitchen sink" ones, is the way magic is so ubiquitous as to be effectively a surrogate for technology. Sometimes it's semi-subtle, but often it's obviously, or even explicitly, an analog of some real world or sci-fi technology -- TV, radio, the internal combustion engine (oh-so-cleverly renamed "internal conjuration engine"), Star Trek transporters, and the like. If you've got the gold to spend, just hire some wizards, either to mass-produce magic items or to act as some sort of sorcerous butler/travel agent/housekeeper/personal chef/communications system. Another thing I dislike about some D&D games is how easy it is to bloat one's spell books with spells scribed from scrolls found as treasure, and how spells tend to be traded and shared freely between the party's spellcasters until everyone's books are essentially complete and homogenous. The obviou...