You may already know, that as a component family, the 'wall' category isn't actually available, so usually in these circumstances, I will go with a generic model family and create a subcategory or if I really need to, settle for an in-place family.
I came across THIS nice little post from 'What Revit Wants' recently as another alternative and so far it appears to works nicely.
In summary, Luke walks you through a method of saving an in-place family (which allows us to select 'walls' as a category) and save it as an RFA file.
I haven't really found a strong use case for this yet, but we'll file it under 'tips & tricks'.
Great post at the Revit Cat by Tim Waldock going all the way back to 2013! It describes how to create a curtain panel that can be trimmed when used on irregular shapes. I wasn't aware of this little trick until recently. I am sure past students will see this and think "so that's how you do it!"
Visit the blog post here.