Doesn't matter that much to me, but I'm more familiar with the US fighters and find myself pulling for them until I'm convinced otherwise.
I would have to say that I expect more from Mexican fighters, as I grew up watching a steady parade of them come across the border to fight in Southern California and they hardly ever disappointed.
I usually find it hard to support any fighter who does too much trash talking, I don't care if it's about hyping the fight or not. I just don't like disrespectful fighters no matter where they come from, I can't help it.
The fact that great fighters are coming from all parts of the world on a steady basis is a good thing, in my opinion.