well....I've done them all...I have just been a PM.....I have just been an estimator...I've worked for companies where I had to PM the jobs I won estimating
There is no bad experience in this great trade...including working with your tools
Every PM and estimator in our office was a field j-man/master/owner in their career path. They all know estimating, managing, and the inner workings of the front office and the field.
At that level, they all wind up doing one or the other based on what they enjoy the most. Me personally...I loved estimating....PM not so much
As a PM you will have to play the cards dealt you (the estimate). You will be handed off a job from the estimator, usually a handoff meeting with a superintendent and job forman.
You will study the documents, bid files, quotes, subs, equipment, and it will be your task to scope quotes, write PO's, make schedules, go to job meetings, write a million letters, make shop drawings, do billings, price/submit/argue change orders.
It's ton of pressure and late hours fighting for small victories and minimizing your losses for months to bring the job in......in budget or better.
Estimating is high pressure too, but a different kind of pressure.
You will find out first hand about the importance of accurate estimating ....so of course it will make you a better estimator ....
You have been estimating long enough, I think, to go get that experience....good luck