Firstly, let me say that you're pretty much all better than me, and I adore all your submissions. If you feel like I'm insulting you, please know that my comments weren't intended that way.
Let's go...
Yilx: I was always in favour of the scorpion and I think it's a shame you went for the other one. That said, I still love what you've done with it. I'd agree with comments that the colours are a little too harsh in places and that's pretty much the only negative I can find.
Birkal: Your two ideas are so quirky, it's brilliant. I prefer your second one though, if you're still trying to decide between the two.
Calad: I can't put my quite figure out why, but I prefer the Clairvoyant to the UFO Cocoon. There isn't really much I'd change about either, though.
Quanyalis: I mentioned in the IRC that I disliked the eyes on your design. That opinion hasn't changed, I'm afraid. I really love the hunched pose you've given it though - make sure you keep that no matter what.
Aragonbird: Ah, the scarab beetle. I very nearly went for this myself, though I must say your execution is far, far better than my attempts. I love how majestic it looks. This may sound really hypocritical, given that I'm on the verge of ditching my design's legs, but I preferred yours with legs.
CBMeadow: Don't you need an outline around that feather for it to be legal? It would be a crying shame if you missed out because of it.
Furosuto: It's a little hard to tell what the finished mon will look like, but I'm a big fan of your progress so far. It's a great concept, keep it up.
Mos-Quitoxe: Please, please, please go with the Sciencefly. I've loved it from the first moment I set eyes on it.
CyzirVisheen: Very very cool, but it seems a bit too similar to Pinsir right now and I'm struggling to see much "psychic" in it. (The latter comment is not necessarily bad). When you develop it further, my comments will probably be invalid anyway.
DarkLatias92: Oh damn, that's cool. I eagerly await a coloured version.
Akela: Your concepts look like they have potential. I'll be interested to see what comes out of them.
Orivexes: Yes, it does look a tad like Syclant. Hopefully, colouring it will resolve that issue.
DougJustDoug: No negatives to find here really. I'm excited for the coloured version.
Asylum Rhapsody: A Rorschach moth. That's so neat. I'd like to see more character in its body though. When animated, would the wings shift into different patterns (like the guy from the Watchmen)?
KoA: I love this concept. It's one of my favourites. I appreciate the whole not-shoving-psychic-down-your-throat thing you're going for, but I'd still like to see a bit more vibrancy in its colour.
Empoleon Guru: The face looks too human for my liking. Other than that, it's a really cool and quirky concept.
TeraVolt: You're one of my favourites. I love your design. I don't know whether the whole Lunatone thing was deliberate, but I really love when pokemon reference one another in their designs and I really don't think it happens often enough. Even without that, your design is so cool. As for colours, I prefer the red to the pink, but the red makes it look a bit like Scizor. Are you going to experiment with other shades?
Nov: Your first design is one of the strangest submissions, but that's not a bad thing. I really like it.
As for your second design, I can't put my finger on why I like it more, but I do. The way it looks up at the sky just works so well for it.
Mari: Cool bug, but I'm a little unsure what those spirals are meant to be. Are they patterning, or its eyes? If you could clarify that in your design somehow, I think it would be an improvement.
WPS: God, that's so cute in a really weird way. And so original. I think it would benefit from more bug-like legs though.
Heroes and Cons: While this is really cool and unique, I just don't see "bug" anywhere in your design. That sounds harsh. Sorry. Perhaps give it antennae or make its limbs more similar to bugs?
NeLLY979: More detail (patterning on it's body, perhaps?) would make this design just lovely. At first, I disliked how it looks like it would have to drag it's abdomen around when walking, but now I think that makes it unique and cool, so thumbs up for that.
Rockspet: I rather like the single eye you've got on your bug. It's very mystical.
ToxicPhox: Another absolute favourite of mine. The whole body design. Just wow. It's so clearly "queen", it's so clearly "bug" and it's so clearly "psychic" without being in your face about any of it. Please, please don't change the body. I can't wait until you colour it in.
Cartoons!: Aaaaaaaaaaaaawwwww. So cute. Easily the cutest design here. Love it.
Doran Dragon: If someone said they were going to make a meditating bug, I'd have been cynical, but I think you've pulled it off fantastically. It looks badass, frankly. I can't wait to see it as a finished piece.