Writer seeks Literary Agent

In bored moments, I have been known to google for literary agents who might want to take me on.  I'm building up a shortlist of possibles before deciding who to plump for first.  I was a bit taken aback by some of the draconian submission guidelines on agents' websites, until I read the following from one agent's blog, indicating what his 'slush pile' of unsolicited manuscripts looks like each day.