Ear modelling is hard, but it gets easier with practice - the thing is that you're dealing with a lot of soft detail, you're trying to have a reasonably low poly count so it can be stuck onto a head, and even then when you stick it onto your model's head, you have to figure out the angles correctly. Personally, the hardest thing to do is t stick a big project through to the end. Modelling is relatively straightforward - UVs can be tricky but there are tools out there to make things easier, but the real problem for me is having the staying power....as my many half-finished projects attest to
