I will start off by saying some of the shit I've read here is absolutely ridiculous. Too nice of a haircut? Bad trunks? John Cena has nearly the same haircut, and wears freakin' jean shorts..give me a break.
And what is charisma?
(
http://www.merriam-webster.com/dictionary/charisma)
1: a personal magic of leadership
arousing special popular loyalty or enthusiasm for a public figure (as a political leader)
2: a special magnetic charm or
appeal <the charisma of a popular actor>
I would say Orton is pretty damn charismatic. Granted, he doesn't jump around, scream and yell like Cena or Hogan, because he has a more silent kind of charisma. I think his in-ring psychology has a lot to do with that. He can make a crowd go absolutely insane (as a heel or face) by giving someone a particular look, or using a facial expression. It's called subtlety people, look it up.
If you like guys who are either going 200 MPH, or lying there getting their head kicked in, Orton is not for you. He is much more methodical than a guy like Cena, or Kofi Kingston (just examples). His style is much slower, but with purpose. If you think his style is slow because he either doesn't care about what he's doing, or because he can't do anything else, you have no clue what you're talking about.
It's all subjective. Every time I log into this forum, I see someone else complaining about how 'boring' Orton is, or how 'stale' he is. Funny I didn't see this much crying when he was a heel, doing exactly the same thing.
Why should he switch gimmicks? The fans began to cheer for him while he was doing the same things he does now. WWE didn't lead the charge in turning Orton face, the fans did.
Do I think he's overly entertaining right now? No, actually I do not. But I think that has everything to do with how he is being booked, and almost nothing to do with his talent. WWE has constantly thrown him into the backseat since his face turn, and have been either lazy or stupid in how they write for him/book him.
As I said earlier, it's all subjective. If you, in your own opinion, find him boring, good for you. But I really hate when people say he's boring, or he sucks, as though it's a fact. A man who does what Orton has done does not suck, plain and simple. That being said, I really hope he's given something interesting to do moving forward, or the Viper character is doomed.