I like hills - I like zoning out and reaching this place where I feel I can keep going forever at a steady pace, all the time knowing that it will end and I'll have a view and with luck a bomber descent to have fun on

I don't like flats though. I get bored, and it doesn't feel like I'm going anywhere. So I slack off, and then I'm REALLY not going anywhere.

I think low gears and a predisposition to day-dreaming really helps with long hills, though