Why Can’t Outlook be Smarter?

I have a hosted Exchange account as my main Inbox in Outlook 2007, and I have five other IMAP accounts. If I open up a new email message, and it’s going to someone (say, my wife) and I always email that person from that email account, why can’t Outlook figure that out and automatically select the sending account? It would save me hundreds of clicks a day if I didn’t have to click the Account drop-down menu, select the account I want to send it from, then click send. This would have the side benefit of automatically changing the reply-to address on the email you’re sending, which I know people with multiple email accounts would like to have. Come on Outlook team, are you listening?