Red Mountain would probably be the best thing to do for YI:B.
It has to be easy on the eyes though. That Mad World texture is just an eyesore if you look at it for too long.
Oph, oph.
Kupo!
I need you to do me a huge favor.
My birthday is in a month and 6 days from now.
Though that's just my excuse, could I trouble you to make a custom texture for me please?
http://images2.fanpop.com/images/photos/7500000/miku-hatsune-vocaloids-7507921-800-600.jpg
http://media.photobucket.com/image/miku hatsune/Ayumi-no-Yume/Hatsune Miku/hatsunemiku.jpg
http://cdn1.knowyourmeme.com/i/4059/original/hastunemiku_dualwield.jpg?1245839970
Would it be possible you could make Sonic's body in that sort of light blue tint? The same Miku is usually busting?
That, and having Sonic wear Reisen's suit?
This is what I believe it to look like most canonically:
http://www.gelbooru.com/index.php?page=post&s=view&id=903341
http://www.gelbooru.com/index.php?page=post&s=view&id=901118
http://www.gelbooru.com/index.php?page=post&s=view&id=856233
I can never seem to find official artwork that has the button count consistent, and I've looked just about everywhere. I'll leave that up to you as to what you think would look best; Two, three in the middle, or on either side, it's all fair game.
Hell, maybe a no button suit, I'm not real picky:
http://www.gelbooru.com/index.php?page=post&s=view&id=891153
One thing you may not see everywhere, is that
yellow crescent moon pin on the upper left side of the tux. You went on earlier about how Sonic's texture is limited in that department though, and if it had to be either no pin or two pins, I'd rather you not put it on there at all.
A couple samples of the shoes, which is the next "important" detail:
http://www.gelbooru.com/index.php?page=post&s=view&id=907144
http://cdn.myanimelist.net/images/characters/5/17710.jpg
http://media.photobucket.com/image/reisen udongein inaba/ZeroEiyuu/Touhou/4sv0.jpg
Now clearly the sneakers will have to stay the same. It'd be lovely though if they could be in a whole Dark-Brown color though.
... And I don't know if this will be possible given the previous criteria, but do you think whenever Sonic goes into a ball form you could put "Kinzer" in there? If that's too big, I could settle for just "Knzr." Without the period though please, that's just a limitation of the English language forcing me to put the closing punctuation inside the quotation when it's the end of a sentence. :/
That doesn't have to be in the final product if it can't be done, but it'd be pretty sweet.
Thank you for at least taking the time to look at the absurd request.
... Oh and, don't worry about the bunny ears. Certainly not the skirt either. I don't want Sonic to be a complete cross-dresser, and if I wanted the bunny ears, I'd go into special mode for that.