buddy-x-wing said:

30 years leading the Resistance, she looks more like a General than Royalty, I can see that happening

The only time we see her looking like Royalty is in Star Wars where she's trying to pass as an innocent princess and not a member of the Rebellion.
The dress and accent were a ruse to hide the fact that she's on an important military mission.
In all the other films she's dressed battle ready. (with the exception of the gown she puts on to blend in at Cloud City, the slave outfit Jabba puts her in and that stupid dress the Ewoks happened to have laying around...)