Your query letter is not a personal ad. I'm seeing a lot of queries that spend too much time (ie more than zero) talking about how easy the author is to work with, how willing they are to to be edited and other kinds of blather that matters not a whit.
And it's off-putting. Here's why: the people who tell me they are 'non-judgemental' are usually the most judgemental people I know; the people who tell me how busy they are are never too busy to tell me how busy they are. In other words, people who tell you they're easy to work with are the ones I suspect of being most difficult. The ones who really ARE easy to work with? It hasn't dawned on them they'd need to tell anyone that.
So, leave the Sincere Fiction Writer seeks Agent style bio off the query. Your name, any pub credits you've got-that's all you need. Include the name of your Herpet-American service snake if you've got one of course.