Because of my involvement with the 501st my husband and I have had the pleasure of meeting a lot of SW actors, both at conventions like any other attendees, to actually being involved with them at events.
Here's my take on some of those attending:
Riz Ahmed - will be meeting him for the first time at SWC Orlando

Jeremy Bulloch - Serenely nice man, very quiet and shy.
Anthony Daniels - Nicknamed "Your Highness" by a few of us whom have dealt with him and he truly believes it.
Sarah Michelle Gellar - will be meeting him for the first time at SWC Orlando

Taylor Gray - will be meeting him for the first time at SWC Orlando

Mark Hamill - and absolute doll, sincerely loves his fans, and sincerely cares... so fun to chat with.
Brian Herring - What a very cool guy, been a puppeteer for a very long time but with BB-8 bringing him into the spotlight he is so not used to being recognized, very excited and very nice! Very fun to talk about details of how things were done, and chatting with him is super interesting.
Vanessa Marshall - Truly awesome lady, truly a pleasure to talk to, LOVES LOVES Star Wars, and is so giddy to be a part of the SW family... and you will note her prices are reasonable because she feels guilty for charging money for photos and autographs, seriously she does, and winced the first time she ever told me her prices.
Peter Mayhew - That kind tilt of the head, the endearing lovable nature of our favorite wookie is ALL PETER, he is such a sweet man and his wife is adorable!
Ian McDiarmid - Very nice but very professional, he is really good to fans on the clock... but that's his day job... he likes his quiet time, he's not mean about it but he is a person, and sometimes too much, is too much and he wants his breaks.
Ray Park - I don't know how such a lovable man could ever be a sith... he is great to his fans, he is great with kids... he is super fun to talk to.
Freddie Prinze Jr - will be meeting him for the first time at SWC Orlando

Tim Rose - Very friendly, but not overly open... on the shy side I think.
Alan Tudyk - He is as outgoing in person as he is in the movies... he is amazingly fun to chat with and very fun.
Billy Dee Williams - Very friendly but time and the circuit has worn on him a bit... Very smiley, very kind.
Matthew Woods - Such a fun guy, nice to chat with, and he's not just General Grievous, he has become super involved in sound ending and design, and is great to talk to about it

Steve Blum -will be meeting him for the first time at SWC Orlando
