You need to put content into a post if you want to start a thread. Post your own ideas or talk about sidequests you like or dislike. I'll leave this open, just because I don't think there's a sidequest thread around.
As for the topic, I like collect'em sidequests to get good items like the Biggoron Sword in OoT. I also like sidequests that improve my skills with the bow, sword, or other items.
I can't really think of anything that hasn't been done before.