This is minor one but it bugs me every time.
I create a new control and forget to change the type from "Control" to "Type Def.".
If I'm lucky I spot it after I drop it for the first time on the BD but sometimes I have to replace quite a few instances after I spot the error.
While there might be usecases for a custom control without it being a type def I think that most users want to use type defs when using custom controls.
Therefore please make the default type of new controls "Type Def."
This functionality is available in LabVIEW 2018 and later. The right-click > New menu in the Project Window provides an option for Type Definition instead of Control. There is also a new Type Definition entry available in the File > New... dialog.