Fabulous!Is what Rarity would've said if would she had seen this.Gags aside.I thought you did a marvellous job on drawing Rarity in this one.Almost an accurate presentation of Rarity's "Ducking around" face from the show too.Though not particularly wild about the shading you did here.Mainly due to the lack in contrast, and weird all over the place shadings.I've scanned through most part of your gallery [Believe me, it's delicious]and odd to say I didn't quite see the same problem as featured in this drawing.Reason being,you can't give realism shadings to a cartoony being.Mostly because there isn't an existing reference that represents the realism of ponies.But with the combination of cell shading and contrast, you could rid of the odd looking shades.And that all applied only for the face.Gasp, yes I know xDNow onto the hair.One thing to note, if you're giving an object realism shadings,it has to be done with a realistic hair.And with that I point back to the cartoon theory I made earlier.What I would suggest doing is, instead of following what manestyle the show has to offer.Use the idea of it, and recreate a hairstyle based on that.If we do it without being spoon fed canon materials.We can too generate our own ideas and innovations for what we aim to achieve.Now you may be wondering, what does being original have to do withdrawing realistic hairs?Because it does.Because with that, you can learn how hair works and flow without being boundedstrictly with existing materials and references.If by any chance you're lost in my un-organised chunks of word mess.Might I direct your attention to this Deviation: [link] Try studying the movements of the hair flow, that'll be a good start for ye.P.s: Sorry for the lengthy critic xDI do get carried away sometimes.