I got hired as an external candidate when I was a TPS.. Based on my experience, it's much easier to hire from outside than promote within. When TM's have too many friends within the store, it is actually against their best interest-- due to the possibility of a TPS looking the other way for their "friends." So to avoid all that, ETL-AP's hire external candidates. And as for your question as to why the demeanor changes, well that's because there is a lot of responsibilities that come along with the role-- way more than just walking the sales floor (what TM's see). At the end of the day, the role has a emphasis on prevention and deterrence, and providing a safe and secure environment, which is why they are in a uniformed role. The expectations for a TPS are much higher than a TM, so they have to make sure they're mature, brand, and always representing the company in a positive manner. Plus they deal with law enforcement and respond to crisis situations.. I wouldn't want some dumb, ignorant, clueless TPS to respond to an emergency freaking out.. TPS' have to be able to control their emotions. Think about it this way.. there are many TM's in a store (wearing red and kacki), and only a few (sometimes just one) TPS' .. if a guest has a bad experience, they're going to remember the uniformed employee over the sea of red and kacki. At the end of the day, we're all here to work and earn the company money.. friendship and all that takes a backseat when you're working.. we come to work to get the job done, not to socialize. Don't take it personally, it's just business.