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.
Porting Disaster: Some releases, such as the PS1 and Steam versions, removed the Gainax Ending. The PS1 version also has some framerate issues, but is otherwise quite playable. However, it's pretty obvious the game was not made with a gamepad in mind, but the controls work well enough that you can get used to it regardless.