Okay, I don't know if this discussion is really relevant to everyday life... but I would like some advice on what to do. I really want to be friendly and polite about this. I'd ask my family, but they're sick of hearing about this guy.
THE BACKSTORY (Dun dun DUN):
So there's this character that I recently decided I liked. While I was looking up stuff about him on the internet I found his voice actor, who's actually a blues musician. I don't know how famous the musician is, but he seems pretty huge in some circles. He's played with a lot of famous people and all he does now for work is tour and sell CDs. And mugs. You gotta be famous to be on a mug, right?

So I wrote to him, asking if he was in fact the character (I mentioned I was doing research and that his name came up.) He emailed me back within the hour to say yes, he was, and if I was doing research he'd be glad to answer my questions.
We went back and forth a few times. He said that he'd be happy to answer my questions as long as I shared what I found out. He said, "And let me know what you find out. I'm suddenly interested!" I even got him to sign a picture of the character for me, through mail.
So here's where the etiquette question comes into play. I wrote him a thank-you email, thanks so much for the autograph, and telling him that I wasn't doing any more research so I wouldn't be sending any more questions, followed by... a
really incoherent sentence. I was trying to catch up on my email while I was unable to sleep. Bad idea. He called me on it, and I apologized for not making any sense, and we haven't spoken since. That was a little over a week ago.
Now. I have a few more questions that have been bugging me, that I'd like to ask (he did leave the door open to ask questions whenever I wanted in his first email, but it was a very vague statement so I don't know if it still applies) and I found a little more information, but I'm not sure whether or not he's still interested. As in, did he not write me back because he had nothing to say, or because my last two emails bugged him or something.
I want to write him back, but I'm worried. I mean, I'm not sure how busy he is and I'm honestly not sure if he's genuinely glad to talk to me or if he's just a very polite man. I'd hate to feel I'm bothering him and wasting his time. I also sort of gush when I talk to him.

And, frankly, after that last email, I'll bet he's regretting sending me his address! (joke) What would be right? What would be polite? Should I just let it go and focus on other things, or can you help me figure out what to say to him?
Also, I want to give out specific details on an as-needed basis, as most of the stuff was part of our personal conversations and I'm not comfortable sharing it unless it will help us figure out the situation. That's why I didn't give out the names of the musician or the character, either. I hope that's okay.
Another thing I thought of, though, is that I sent the email to info @ hiswebsite.com and he emailed me back with hisaddress @ aol.com. Think that means anything?