I do the same; in fact, I've never used the auto-route function. I too came from drafting manually, so it was a logical move to keep on with the same method of layout. Sometimes I have to revise a few times if I paint myself into a corner, but it doesn't happen very often.
I draft all designs manually using the Pentel image processor and a large gum edit function.
I don't trust software to make a better decision on parts placement and routing than an engineer with fourty years of experience.
In other words, I'm a grumpy old analog man that doesn't trust these new-fangled sandy state thinking machines, and can't learn new tricks.