i dont think ive done much fanart for fellow artists save for maybe free requests (im always so shy about asking) but i enjoy it when i do
i dont know if its somwthing thats ive done for inspo tho its probably coz any instances of that tend to be subconscious things like looking at use of colors or line style or shading and so on
i think the only time ive ever really dug into fanart had been for stories or characters that really grabbed me like sonic having a 20+ year grip on me or undertale/deltarune for however long its been around and then recently the Ena series
thats like ive kind of managed to quell my self doubts coz I realize sometimes what makes the fanart something nice to see or recieve is not the quality of it but just the fact that someone considered which is how ive felt on the rare occasions ive gotten any plus its just fun drawing ocs outside of your usual wheelhouse so its got a handful of little benefits and it makes ya feel good
edit: realized id missed one of the main points but i dont think ive ever put fanart over ny own stuff, at least recently but thats coz the brainworms i have for my own ocs have been really crazy even if its been more in the writing than the drawing