At my work, nearly all the executives have either no case or a very slim, low profile case. I think a big factor for them is appearance, and not talking about a case either.
I think with my exec/VP, stressing about what kind of case to get or which case looks the best reflects poorly on them. You know, VP's shouldn't waste their time fretting over their phones and stuff. That, and they're execs. They make more than enough to replace a broken/stolen phone. Us wee folk can do this since there is a considerable gap in salaries. For the most part, our execs are pretty much "whatever" with their phones and could care less about the type of case, if any, they use.
And yes. No exec should ever use an Otterbox case unless they're constantly working on site or i a warehouse. OB's are more for the working class folk than execs p