I have been reading through this wondering why no one has posted a picture of a Brooks they like? Thankfully Stronglight posted that lovely antiqued B-17. Very nice!
I've never met one that took any time to break in, old, new or decrepit. Let's see, I own 3 Professionals, 1 B-15, 1 B-17, and 3 B-72s. Throw an Ideale #80, a Belt (about B-17 size), and a NOS Middlesmore (about B-15 size) into the mix, and lets just say, I have a leather saddle problem.
The two I rode the most this summer: A new Honey Professional and a '71 vintage B-15 (now used on my '03 Cannondale comfort bike).