So, I re-organized my room today which is nice. I also organized my favorites as well, although I'm not sure how to keep them isolated to groups so they don't all appear in Featured. The categories I used are:
High Quality: Means I was impressed by the overall quality of the piece and the work put into it.
Steampunk: I favorite most steampunk stuff.
Humorous: I laughed either because of the punchline or because of some stupid small thing that shouldn't have been funny.
Clever: Something in the piece was original or unique compared to most art, and caught my attention.
Pony Vehicles: I favorited most of the vehicle animations.

So if I add your picture, now you know why! Of course I usually comment anyway, except on the high quality ones because I'm usually at a loss for words.