I see so many off-hand comments about hating hills that I gotta say, I like hills. I actively search out rides with more hill. I like standing up and pumping up short hills, and sitting and grinding up long steep hills. I like the vistas that getting to the top often provides. Fast descents are fun too, unless they get tediously long. I dislike long flat rides. I also kinda like riding into stiff headwinds.
I know I'm not alone, as there are many group rides that feature climbs.