I've always struggled with and immensely disliked drawing birds and flowers. My first commission was an enormous rooster painted twice, once on each side of a B&B sign. My second and third commissions were both sunflowers, of which one was about a foot across and the other was double that. So. On the bright side, now I'm much better at drawing both and appreciate them much more!
That said, I gotta echo @whydocowsfall and say that legs are TERRIBLE. I hate legs. Feet are also very difficult, although that might be because they're attached to the legs. I also don't like drawing architecture, because for whatever reason straight lines are nigh impossible for me. I also dislike drawing rocks and water. (But mostly I just hate legs).
