Is Google Calendar the one that is stock on the DT? The ACalendar is a little easier to see than my stock.
I guess its all a matter of what one gets used to using. Ive never been one to use a calendar...... trying to get used to it and feel as though that will then become my norm so sorta want to pick the right one up front.
Not sure if they went with the Google Calendar on the DT or not. Easiest way to tell would be to search and find it in the play store. It'll tell you right there if it's installed.
I don't use the calendar a ton myself. I have some reoccuring bills in there, reminder to change contacts, reminder about the days we put the recycling out.
However, I setup a shared calendar, so my fiance puts her work schedule in (it varies a bit) and anything to do with my stepson (school programs, appointments, days that we'll have him that we usually don't), so that's on there too.
The thing I didn't like about the Samsung calendar was the widget, which is the main way I interact with mine. I want to be able to see what's coming up. She liked the entire month widget, but it feels cluttered to me and you have to pick a day to actually see what's on the books for that day.
With the Google Calendar "agenda (think that's what it's called)" widget, it lists events one after another for a week or two and I can scroll and quickly see what's up. Of course, I've used this widget for a number of years, so you've got a good point about what you become comfortable with/used to using. I used the Samsung month widget on my s4 for quite a time, but I just couldn't do it anymore. The other is way more convenient.