While composing a new post a difficulty I constantly face is to choose 'categories' from the dropdown menu, it's hectic since my dropdown menu is too long. Please try providing a feature like you have for adding tags, like on clicking 'Choose from the most used tags' - tags are readily visible and clickable rather than dropdown menu which is easy for rapid and effective visual identification of tags. So kindly think of making the category adding in tag adding way (as written above), at least please keep it optional for those who find the dropdown category menu hectic.
Another suggestion, not everyone has time and neither everyone are expert in blogging- thinking them in mind please add this support section to dash board or some other places so that its easier to get this support page.
The blog I need help with is drsumantasaha.wordpress.com.