Your update does make it sound like someone else did the age old - If Luvmyhackney can have all that extra bedding then why can’t I do that too?’ And their horse is probably not as neat as your horse, plus that is more storage area for them to store their shavings, etc.
One of the problems in boarding barns, if one has it, they all want it.
It probably would not hurt to have a conversation with them about how your horse’s blankets are getting gross and is there any compromise that you can come to that will make you both happy.
To answer the question you asked, all three of my horses are bedded differently.
The really piggy mare has almost no bedding. Her stall gets stripped every day because I am sure her goal is to make her stall as messy as possible. (And yes, I tried deep bedding because so many threads here say it is better with a messy one, not with her.) The riding horse manures and pees in one spot in a neat pile so I had a problem with her stall getting dusty so I switched her to straw with pellets underneath in the area where she pees. The older horse has deep sawdust with extra pellets in his pee spot.