What exercise do you enjoy more: Running or biking?

I enjoying being on my bike MUCH MORE than running.. Running is so much effort hahaa I get tired quicker. I think riding a bike is more fun because of just cycling fast and deffinatly going down hills hehe! Sometimes you don't need to pedal to move if you know what I mean. As in, You been pedaling so much that you can just stop and you still be moving! So that's effortless transport haha xD Oh wait, this is suppose to be exercise xD I'd still say biking is better. Put's less strain on your knees! When i'm on my bike I can feel the burn in my thighs more than if I was running.