I've just been pondering more on the subject, running back into the Customs and Edits section to meander through all the old locked posts to come up with EVEN MORE to say on the matter, and more or less I feel like I'm gonna be saying some of the same thing, and I'm probably gonna sound mean to the kind of people who like doing simple recolors and fan characters, but I'm a mean skeleton man.
Numero Uno: There were about 3 different threads for "custom" sonic sprites on the front page alone. Believe it or not, Fire Sonic was the best sheet of the bunch, not only actually featuring Sonic (albeit in a form he never takes), but also because, despite being a Frankensheet, it had some fun animations going for it. Now take a look at Dark the Hedgehog a few threads away, and we get to see the same pose of a crappy sonic edit quite literally rotated to make a flying "animation". In fact, the same sprite is used all over the small sheet, save for a spin-dash pose, one of the EASIEST poses to copy from a sonic game, requiring little more than a recolor. Granted, I didn't even look at Dash the Hedgehog today, I looked at it some other day and it was essentially a recolored sonic.
What's the problem with all of these? No matter what you do, what you say, or what you think, you can't sell these as original or riveting ideas to anybody sane on this site as they are. Why? Well... more reasons than I can count on my left foot, so let me try to abbreviate this.
1. Say I recolor Sonic, and all Sonics are acceptable, I'll just call him by the name the computer calls the color with the name Sonic tacked on the end. I can churn out billions of different combinations of just coloring alone, and eat up millions times more space than all the original material currently on the site combined. The reason why THIS is stupid is anyone with half a brain and a decent computer painting program can do this themselves, all they need is the ORIGINAL sonic sprite as a base. Therefore, recolors are pointless.
2. Sprite mixing is bad 90% of the time as far as higher quality stuff is concerned. The site is trying to have a higher standard of quality about the sprites they accept, from what I've seen anyway. There are issues about palettes and just general jarring visualization that arises from mixing sprites between styles. It can be FUN, but not submittable material.
3. These fan-made characters, more often than not, only hold meaning to their creator, and maybe a handful of people collectively loyal TO the creator of said fan character. However, that doesn't mean they hold meaning to anybody else. And who's to say that a fan character isn't just pulled out of someone's ass? I can create a fan character right now!... "Leticia Belmont, the hottest and only female member of the Belmont Clan's vampire hunters because Legends was gay and totally not canon. She looks a lot like Yoko from Dawn of Sorrow, 'cept she's got brown hair and wears bright purple and has enormous boobs, so I'll have to photoshop those out a bit. She totally seduces Dracula and they have a son, Alucard II, who has black hair instead of white and uses a sword that has fiery red effects instead of blue because that's so evil..." Guess what? Nobody would even give a damn.
If nobody has emotional attachment to the character, why would they even want to bother?