An intermediate level of difficulty between "easy" and "medium." Not quite as easy as "easy" but a little easier than "medium."
Most easy Sudoku puzzles are no challenge at all and do not provide me with adequate entertainment. Yet medium Sudokus are often too difficult to be fun and cause me to feel frustration and/or rage. There should be such thing as "measium" Sudokus - they would be perfect for my skill level.