How do other officers view mustangs given their enlisted background? Do they look down on them or are they seen as a more weathered officer?
I know there are a lot of people in the officer ranks that everything has to be about status and what your background is.
Also what's the typical personality of most mustangs? The majority I have ran into seemed like they had a stick shoved up their ass.
If you changed "mustangs" to "Naval Academy Grads" or "ROTC grads" or "OCS grads" they answer for all three would be the same: it depends.
Like any other officer, someone who is a Mustang, whatever the name implies, should be judged on actions and abilities rather then by where they came from. If you are a dirtbag, doesn't matter where you got your comission, you will be a dirtbag. If you are a hard charger, it doesn't matter either, you will shine.
It ain't about pedigree, because for every great officer from whatever commissioning source you choose, I can show you a bumfrom the same place who probably ought to be scooping ice cream.
Here is the one thing that a "mustang" brings to the table that other junior officers don't: experience. But again, whether they use that experience for "good" (taking care of troops, providing valuable insight, knowing when to shut up, etc) or "evil" (disappearing when they know that real work is coming, being a loud-mouth know-it-all, etc.) makes a huge difference.