It would be nice if when opening a single file by right-clicking on it in Windows Explorer, the program would automatically focus on it and read the tag. I'm sure that 99 out of 100 would r-click on a file and open MP3Tag with intention to view/edit the tag.
This would eliminate one extra click and mouse movements to point to the file in the list. This could even be extended to an option of whether to always select file(s) when right-clicking on the in the Explorer.
Actually, I just realized that hitting Arrow Down key immediately after program opening does the trick but it's not intuitive of course.