I love/hate climbing. They can be such a challenge and I push myself hard on them so that they're usually very uncomfortable. It's a contest with myself to see how high a gear I can push seated or how fast I can spin up it. But I love it when I get to the top knowing I did it faster than last time and on the way down....it's exhilerating and I'm ready for the next one. It's a sick form of punishment with me that I enjoy. BTW....I weigh around 144lbs and am about 5'8".