In films, books and video games sometimes we will have a series that starts out using numbers, then switches to numerals and vice-versa.
Something Else 2
Something Else III
This is annoying. If you could make a whole franchise just stick with one or the other, which would you choose and why? I prefer standard numbers because it can be easy to miscount the number of I's in II, III, VII and VIII when you're scanning through text.