I'm the other way. Gads but I hate flats. Nothing more boring than unbroken flatlands. It's as bad as riding on the trainer. Can't stand it. Give me hills!

I'm not fast up them, and often feel like my heart is going to jump out of my chest and hit the ground with a wet "plop," but the effort sure feels good and makes a ride interesting. Short hills, long hills, steep hills. I don't care, bring 'em on!

They never get easier, and steep ones just plain hurt. But you do get faster.