Nathan Bransford is a very smart agent.
Nicer than me by a long shot.
He gives good advice on his blog.
Here's yesterday's on the topic of queries for novels: less you, more story.
As you might suspect, the reason I put up the link to that is cause that's exactly how I feel too. And my experience matches his: recently I've seen an uptick in queries that try to sell the writer rather than the novel.
I'm just not that into you.
I am however very interested in your novel.
Nathan says it....but nicely.