These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Anticlimax Boss: The Dark Savant is a deeply underwhelming final battle for the Dark Savant trilogy.
Demonic Spiders Potentially any monster in enough numbers or if you're unlucky, but some enemies from 6, 7 or 8 really take the cake.
Germans Love David Hasselhoff: Although fairly well-received at home, the series was absolutely HUGE in Japan, with graphically enhanced ports developed for the various Japanese consoles. In fact, due to a quirk of the Japanese licensing, the Japanese Wizardry games have survived the American parent company's death — Wizardry Gaiden: Prisoners of the Battles came out 6 years after Sir-tech collapsed, with more planned.
Game Breaker: In VI and VII the ninja comes awfully close to being this. In the last game the class has so much overhead it's no longer worth it.
Most Annoying Sound: Outside the tower in Arnika in 8. It creates a loud humming sound, and chances are you'll run into a huge horde of enemies. Try fighting 14 robots at once with that humming playing non-stop and not go insane.
In VII, resting. In order to heal your party by resting, you had to spend several real-time minutes waiting for in-game time to pass after hitting the "rest" button. And you might also be ambushed while sleeping.
Somewhat subverted as clicking rest again stops it anytime. A handy way around this is that your magic meter fills up almost immediately. So rest for 10 seconds, cast heal wounds on the rest of your party, rest for 10 more seconds and repeat. This way works much more efficiently than waiting several minutes.
Character creation. If you want your character to be of a certain class, you need to have enough bonus points, with the required amount depending on your race and gender. Bonus points are given in random amount after you choose your character's name, gender and race, and if you don't have enough to choose your desired class, there is no back button so you still have to allocate all your bonus points and skill points (which can be a lot), and possibly select your starting spells. Some of the fancier classes require truly massive amounts of bonus points, so it can take you around one hour to get enough points to select them. Merely starting the game can take hours of preparation.