Pretty much Stereogum, Pitchfork (for better or for worse) and to some extent Allmusic. AOTY is also a good resource to see what's out and to get links to all review sites at once.
I used to check G vs B a lot too but we grew apart for some reason... probably my changing tastes. But I do have them to thank for Toro Y Moi and Neon Indian.
I feel hipster saying that I rarely to never read reviews and if I do it's after solidly forming my opinion to begin with. I certainly don't seek them out. I guess I counter my hipsterism by admitting that while I don't follow or worship in any way, I do respect Fantano's methods and insights.
It's really not for the review portion, more for the discovery of what is new and coming down the pipe and descriptions of what a band sounds like/type of music etc...
I like criticism done well, music or otherwise. Hell, we'd have no philosophy without criticism. With that said, I like most of the aforementioned pubs. I'll check P4K weekly to see what's new. This place works well if you just want new.
I still read AllMusic a lot, especially when I’m looking at the discography of an established artist who I’m not familiar with. I know it’s not a ‘cool’ site, but I like their utility as a review/wiki resource, and going there is a tough habit to break after 17 years or so.