Dangit, I wish i could have posted to this thread earlier.
My thoughts in no particular order:
I agree with kenjib and sigil mostly on this. I'm more of a traditionalist, and would like to see the style reeled in a bit. Less science fantasy, more medieval fantasy. "Its all fantasy", good point, but I prefer (I prefer, not everyone,) a more earth-like renn-european style. The closer the fantasy world is to my own, the more I can relate to it, ya know? Not to say that spiky armor doesn't have its place...Sauron himself wore it quite fetchingly in the LotR movie.....but the PHB armor illos HAVE...TO....GO.
No issues with the tattoos. Tattoos have been around for centuries. Same with body piercing, but some characters should NOT have them...Nebin in Tome and Blood and Elminster in the FRCS are two examples. El, lose the earring, bro. You are trying way to hard.
Iconics: Can't stand the illos of Hennet, Mailee and Alhandra for the same reasons everyone else mentioned. I DO like Vadania's pic, tho. However, my most hated iconic illustration: Sovelis. I'm not sure how a few sparse metal pimples sprinkled on leather could be called studded leather. And why do all elves in the core books have a look on their face like they just stepped in ettin poo?
For some reason, Sovelis reminds me more of a VULCAN than he does an elf.
Technically, this batch of artists are some of the most talented I've seen for this game. But as for style, hhrrmm... Lockwood: super talented, just don't care for his design.
I hate to be hypocritical, but there is just something about 3e art that connotes a feeling of..I dunno...immaturity?