A critic is really only as good as their track record. If you only read one of their reviews, then you have no idea how their opinion will jive with yours. If you want to use critics to help you choose a book to read, then you've got to cultivate a feel for their taste and writing style.
Back in the pre-digital days, this was easy. You only had to choose from the NY Times, LA Times, your local paper and maybe your local TV or radio stations.
Now, it's anybody's ball game. With thousands of blog reviewers, some with the readership of a city paper, critics are scattered all over the planet and it's hard to get a feel for who is good, who is great, and who is a waste of time.
And, make no mistake, critics are important to writers, more so now than ever. With a slew of "raw art" on the market, consumers need someone to tell them which books are good, which ones are great, and which ones are a waste of time.
So, I thought a list might be nice. Who are your favorite critics and how do we find them?