Just like a number of other people, I usually get my fits of shyness around VAs. I try to make small talk about a show they've done, meanwhile I think to myself, "Say something INTERESTING" or "Don't blow this." Or something like that. Some of the first guests I ever met were Uncle Yo (anime comedian), Kyle Herbet, Steve Benett (Artist), Wendy Powell, and Monica Rial and Mike Sinterniklass. Each encounter was different.
With Kyle it was pretty chill and Wendy was nice. Monica is nice every time I've seen her (3 times), especially about past characters she's played from animes not too many people talk about, mine was kodocha. Steve was similar. Dressed as L and having played a few rounds of FLUXX, you'd think Uncle Yo wouldn't be looking at me like I had a Death Note in the pic we took together D:
The weirdest guest encounter though was Mike. At my second con, I was in line, with my friends, for his autograph cuz he was from Kappa Mikey. So I start singing that theme song. He hears and recognizes when it's one of my friends' turn. I tell him that he's cool, all shy of course, and ask that if he ever sees the guy who plays Gonard (Sean Schemmel) to tell him the same. So, Mike being Mike, whips out his cell and speed dials Sean. He tells him was I said, introducing me as a sweet person. He hands me the phone to boot. Sean and i proceeded to talk about what he was doing: getting food from the fridge and and watching the Discovery Channel while only in boxers. And to top this off, Mike and my 'friend' start filming me blushing like one of Romano's tomatoes while I talk to a boxer-clad Sean Schemmel. And later, I find out he voices Goku. On reflecting, I wish I had spoken to him longer XD
Then last year, at a local con, I was in the dealer's room I heard a couple of dudes whispering. All I manage to hear or course is, "I think she's cosplaying Lolita." I flip around to find them looking at me and my friend. She was Aerith, so I looked at what I was wearing and laughed. They had been talking about me. The sad part was that I wasn't even cosplaying that year XD
(After Con) Same con, one year earlier, the con photographer asked to take a pic of me. I was Xion from KH. I did. Later my friend tells me that she was asked by him to hook us up. I just thought it was awkward cuz he's older than me, but also that didn't even ask me to my face.