HiYa
It depends on what post you use.
I used to snap posts bitd weekly and also sent back a few DB frames due to seat post damage.
I finally used an 18" Renthal straight for race and Renthal lay back for freestyle. Never snapped either of them.
Got my Master about two years ago and the lay back on it melted like cheese within a 2 mile ride of pulling wheelies.
I got a Stong post (Craig Strong) post on me old faithful burner and that is up to the max height and that has not given in after nearly two years of hard and heavy use.
If you are going to use the bike, it's got to be comfortable and useable.
PS - I weigh in at more than you, so you'll be fine with a good make.
I prefer the look of straight posts on some of my bikes, but find it does get uncomfortable when you go for a cruise.
J