Icons? (Patreon)

So been thinking about the fact that I'm posting more now that I've taken over the editing and such and other than the ones that get book covers I really have just been using the default 'story' on FA and similar to SF.  I used to just go on google and take a random picture but don't feel like that's all that great either.  So the question is do I take the time to make something up for each story and if so what should they be?