I am not going to bitch about interface but I would like to bitch about lack of customization of shortcuts. I mean we have such amazing software called Blender with great features. But shortcuts are hardcoded and cannot be changed. I can get used to interface but I personally cannot get used to blender shortcuts. Most of them are misrepresenting or placed in wrong places to my taste and I would like to change them (also make them similar to mother softwares I use) . It is such an overlooked feature that is missing from Blender.