I only sideload Kobo Store books if I need to fix the formatting, e.g. stupid ugly fixed fonts. Otherwise I just download them from the store.
I also use a custom "On Kobo" column and make very heavy use of column icons:
Here you see a fanfic I need to update on my device, a sideloaded book from another store, a book from the Kobo Store, and a book borrowed from Overdrive (I keep records for them so I can keep track of what I've read).
