I dunno. I do on mine. Let's me see what happens when meds are tweaked. Which is a pretty important thing. Charting a day (though I've never actually timed it, lol) probably takes me 30 seconds tops. Probably more like 15 seconds most days.

(I designed my own chart --typical, lol!-- from looking at other systems and using the factors most relevant to my situation. For instance, some systems have a place to enter weight. As my answer would always be, "just barely enough", there's no point in including it. But for others, this might be useful -- med side effects or whatever.) Basically, mine includes:

Mood rating for the day (quick dot on graph)
Hours of sleep
Sleep issues if there were any -- can't get up, couldn't fall asleep, whatever (simply represented by a quick swipe of different colors of highlighter, I don't write it out.)
Work (if there was, with just an "x" with d/s/g to indicate which shift, as I've worked all of them)
Anxiety level,
Irritability level
(On anxiety and irritability, it's just a quick dot indicating low, medium or high. There is a small space if I want to make a quick note about it, like "got lost" or "public meltdown".)
Dosages taken for all my meds. Let's me know when I missed or adjusted. Most of the time, it's consistent, so it's as fast as simply writing "300" or whatever.
# of drinks if any.
Then I have a little space if I want to write a thing or two to jog my memory of which day it was(!) "Big clean" "concert" etc

With mostly dots and color, it's really easy to see trends. Dots topping out in the irritability? Problem. Is there a lot of blue (can't get up) in the sleep issues zone? Guess who's depressed? Or going there. Lots of green (can't fall asleep)? Someone's either going hypo or has conflict issues she's not dealing with.

This is probably way more than you wanted to know, lol!