Mostly just wrestlers.
Rey Mysterio - Back at an autograph signing in 2003 I think was the year, anyways he was a pretty cool dude.
Scott Steiner - Never been a huge fan of his (though his promos are tremendous), and it seemed like he didn't want to be at that particular autograph signing.
Stacy Keibler - Back when she was still with WWE and she was with Steiner at the same signing. Very nice and gorgeous in person.
The Bella Twins - In 2010 at an autograph signing, both seemed very nice and great looking in person.
Here's a photo of me with The Bella Twins:
I have met some indy wrestlers like Johnny Yuma (who sold me his t-shirt), Scorpio Sky, and Chuck Taylor, who I got a photo with as well:
Non wrestlers I have met some local radio personalities at a car wash for some fundraiser that they were doing a few years back:
I have also met legendary baseball closer Trevor Hoffman, and Mr. Padre himself, the late great Tony Gwynn.
I know that it doesn't count as meeting but I am friends with "Naughty" Bobby Ramos of PWG fame on Facebook, and he's wished me a happy birthday before. Also, I've been retweeted by Tyler Breeze, and most recently a tweet of mine was favorited by Kevin Owens.