I was a premie for 10 years and never, ever found Rawat a charismatic speaker.  I wanted to, but I never did.  Also, I found that most of the people who said he was a charismatic speaker were premies, who also said really outragous things like there was light coming out of him, he was "so beautiful" (now COME ON!!! beautiful he IS NOT), and who also believed, like I did that coming into his presence and kissing his feet, transformed you.  So, one would need grains of salt with those comments.

I found that people who weren't premies, who I brought to hear him, almost fell asleep, and found him repetitive, trite, etc.

True, he does have a speaking style which he uses over and over, in which he pauses a lot and never says "um" or "ah."  That is nothing new and is a common mechanism to make what you say appear to profound.  He also appears to have complete confidence in what he is saying.  That is not the same thing as charisma, and may, in fact, just be delusion and/or extreme narcissism.

If you step back and really watch what he does (for example, take a video and put it on fast forward, you can see him pause an poke his face towards the audience over and over and over), you can see what he's doing, and it wears very thin, very fast.

I knew nothing about Rawat's personal life before I left the cult -- it had nothing to do with why I left.  I think it's relevant because Rawat presented a different image of he and his family to the premies, and also went to great lengths to hide his drinking, adultery, mistress, etc.  So, it does reflect on the kind of person he is, especially because he was smoking dope and drinking while telling the ashram premies to avoid alcohol drugs and sex.  That kind of sucks.