Seems everybody is stressing over Dave because they're traumatized by R&M, but that's no concern to me at all. He pines after a giant evil demon and it's a cartoon; he's gonna take some abuse. He doesn't seem totally miserable, but Lucia's abrasive and short-tempered characterization doesn't work if Dave is wanked to be confident and successful, so get used to him being the butt of jokes.
Aside from that I'd like to see more done with the title character. The first short did a good job introducing the characters, but was a little focused on Lucia. I'm hoping if there's another short it'll center more on Satina instead of her parents. I also think the cast could stand a bit of expansion. Some friends of Satina's or a villain to play off of.