What Is Your "perennial" Route?

I found myself on four routes I hadn't touched in a while (some not for years). NTP, ECML, ECW, IOW original).

NTP I can't remember the last time I'd even considered it, but here I was the other night driving a Class 47 between Manchester and Leeds (which I fell asleep on as I was tired at the time) as well as the Tools of the Trade Scenario.

Although I found ECML to be quite boring.