Curiously we've gotten a number of concerns about maybe the branding will push people away by thinking that the goblins are evil or scary or will frighten children, but we've never actually had anyone tell us that it actually invoked that reaction in them, just that they're concerned about it. And a lot of people seem to really like the goblins.
We do have a light theme called "airy"; there's some debate about whether that theme should be default. The choice of a dark theme isn't to invoke something dungeon'y, it's to put spotlight on the media, making the media the "light" of the scene. But anyway, maybe at some point we will switch over to airy by default... we'll see what the future brings.
Thanks for your comment!
Glad to hear about theming. Flickr/500px/other sites chose to let users opt-in to black backgrounds, I think that is a nice approach - some media is better highlighted by a dark background, but not all. All the best to your project.
Also I beg of you to fix the color temp on that cupcake photo. People who are interested in sharing media will notice.
I realize that the FreeBSD mascot is a devil, but FreeBSD is a far less consumer-facing product than MediaGoblin aims to be. Moreover, the FreeBSD team has struggled with questions about the appropriateness of such a mascot for corporate and marketing purposes [2].
1. https://en.wikipedia.org/wiki/Goblin
2. https://en.wikipedia.org/wiki/BSD_Daemon#Use_in_operating_sy...