The thing I don't get about Jenazad is, if he wanted to fight the best fighters that badly, why didn't he just track down Ganosuke,Hayato or the other "Few" masters that are on the same level as Ganosuke/Hayato as Sakaki put it. Also there are masters like Senzui,Saiga,Kushinada out there as well and guys like Ogata are also trying to reach that level too!
This is annoyed me about Jenazad because he took out his bloodlust on his disciples/followers as oppose to using his resource to track down the best of the best in the hsdk universe.
This is actually not that surprising. Jenazad DID challenge Mikumo. He kicked the pool that she was meditating in apart and then dashed acrossed the water to face her while she runs up the water too. Any other master would have took the bait and fight him right then and there. Mikumo did not, because she had a plan.
Besides, Jenazad did fight Hayato to a draw before, and really the only reason why two good friends would fight each other in such a bitter fashion that hatred results is when Hayato knew that Jenazad the hero was gone and the only thing left was Jenazad the psycho. And THAT fight ended in a draw.
It is entirely possible that Jenazad believes that he is unbeatable in normal circumstances, and is only beatable if he riles someone up until that person fight him with his life on the line, like Hongo did. In fact, he probably expected Hayato to come, since he knew full well that he kidnapped Hayato's granddaughter and brainwashed her, basically giving Hayato all the necessary reason to bet his life on a fight...
About why he didn't challenge Saiga / Senzui, he probably didn't know Senzui, and only knew Saiga, and even Hongo was surprised that Saiga was that strong (he commented during their fight to the tune that Saiga isn't just a figurehead, but actually kept up to the standards of the Nine Fists), so Jenazad probably thought Saiga is just a very rich and well-connected dude with an organization, as well. This probably applies similarly to Gannosuke. Even the Elder fought Gannosuke for the first time, so the world was probably large enough that they never knew each other or crossed paths.
And finally, we never even saw Jenazad use weapons before... and he was a master in all the Silat weapon arts too. It was entirely possible the he held back even in the fight with Hayato, because with the weapon advantage he might have won, or at least draw but wounding Hayato too instead of just giving him some bruises.
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About the question, I probably will not take my chance with Michael (and of course not with Jenazad if I knew his reputation, he certainly looks semi normal, even benevolent, without the mask...). But seeing either of them in actions will galvanize my belief that it is possible to beat the limits of human physiology, and that will just set me on a path of research until I figure out those secrets... basically I will become Akisame (in 20 years) after seeing a grand/legendary master in action.