I might prefer without letters and numbers.
In any event the letters are usually capitalized to indicate the piece but
lower case to indicate the square.
I also prefer the board without notations. I plan to get rid of them once I learn how to play this game! I thought about the upper and lower case issue as well, but it just doesn't look as nice with lower case letters. Although, we both agree that no letters at all would be best.
Wow! :-D