Both appeal to me for different reasons.
I like fan art because it is interesting to see different takes on the same established character, and sometimes it’s good to do fan art as a test of your artistic skill.
Original characters are more interesting to me because the creator has not only had to do the physical design but come up with a backstory, personality, hopes and dreams etc… for the character, which is a lot harder than doing a picture of an established character.
Wow thanks everyone! I go for originals 100% and it's what I enjoy the most, so I was hoping to get possitive votes on that and I was right!
I was curious because of a simple reason. I've been drawing human/fantasy art for lots of years and my original characters didn't get much attention (almost zero! :'D). And when I draw a fanart sketch, not even pretty, I get lots of likes and RTs (talking about twitter) and it really pisses me off!
But here it was totally different and that's why I made myself comfortable here! I like drawing original stuff... I also enjoy every now and then to make a fanart of characters I like, but not as my usual art.