At last a thread I feel I can contribute to!
* I don't take kindly to helpful advice while I'm editing, in fact it's one of the few things that makes me revert to a petulant 6-year-old. One of the reasons I don't do MEPs. It's not that I think my vids are perfect, I just don't think I can make them any better, sad as that may seem.
* Composition. How do people do this? So often I am reduced to shuffling clips around the timeline until they don't suck too badly. After that I'm afraid to touch anything (see above).
* Reliance on high concept to cover the fact that I can't edit (see above).
* Too much time just watching the video over and over, including parts that I have no intention of changing. I kid myself that it's so I can better judge the "flow" required for the unfinished parts. In fact it's because if I watch the good bits enough times, I might get the confidence to lay something down on the big blank areas that I have no ideas or suitable footage for.
* I hate doing lipsync, and I'm not that good at it. And yet I still use it in almost all my vids.
* Effects? I can do effects if it's to sell a gag, but if I try to get artistic it looks embarrassingly bad.
I glad that I'm not alone in some of these afflictions.