Recently, I have had to create several custom wallets to hold some less common tokens. These wallets get generic icons that are sometimes hard to keep apart in the list of transactions. My screenshot below illustrates how similar these generic icons are.

I'd find it helpful if we could assign custom icons ("upload picture") to all the wallets for which Koinly uses generic ones. Changing icons through file upload is pretty standard these days across the web.

Custom wallets would be easier to spot when searching for possible transaction errors.