If you were in charge of admissions, wouldn't it be a little freaky to see transcripts with all "A"s and "A+"s for a student? I would wonder if that person had a "life" and if they might implode at the next level of coursework if things went less than perfectly. I was a pretty uptight undergrad student, nothing but A+, A, or A-. I actually liked it when I got an A- in a course because I thought, "well, they will see I am not a robot", when my transcripts are reviewed. I have no idea how admissions committees look at these things, but if I were on one, I might be slightly biased against students with flawless grades, worrying how they might fare at the next level. I guess that's what the essays sort out. This is not a personal question, BTW. I've already been admitted to my program. Just general curiosity.