you should probably divide these up a little better, the way it looks now it seems like you have a Bariaur Half-Elf Brownie rather than a Bariaur, a Half-Elf and a Brownie
you also seem to be a little...obsessed, with "taur" races that seem redundant
Bariaur - I honestly am not sure what this is just from the name.
Half-Elf - Standard.
Brownie - I sure hope this is one of those "Needs 6 Monster levels" races
Half-Giant - I would think you'd be better off with Goliath's than a Half-Giant. My only rationalization with this is that they're magically created...otherwise you have "logistics" problems with proving how this works.
Centaur/Zebraur - Centaur are a classic creature and understandable, I don't think you need to give a name for "Zebraur" since it's just a variant of a Centaur that just happens to be striped. Think of it if you were doing it with people, you'd be called a racist. This seems more like a "Regional" thing than a "Race" thing since they're a type of Centaur.
Elf - Standard
Half-Orc - Standard
Griffon - I don't really see how this would be a playable standard race unless the Griffons in this world are HIGHLY intelligent and able to speak the Common Tongue.
Halfling - Standard
Liontaur - This just seems...awkward...a Sphynx would seem more appropriate since that is practically the same thing. Again, seems Redundant.
Human - Standard
Pixie - Again...I hope this is one of those races that takes at LEAST 6 Monster Levels.
Kobold - Arguably standard.
Tigertaur - Redundant.
Leopartaur - Redundant.
Lizardfolk - Could be interesting based on their "lore"
Merfolk - Different, but for a playable class, I feel they'd be VASTLY limited and would only be for certain campaigns. I'd look at giving them the ability to "land walk" at a young age, seeing as that is VERY popular Lore for Merfolk.
Raptoran - Always "different"
Worg - I think this falls under the same critiques as the Griffons.
Answers to your Questions
Yes, I did make both the Signature and Animated Avatar...
No...the signature actually started as Manga Scans, just touched up...
Yes, I will make more of these...
Maybe, I only do requests if you supply the stock images and they interest me...