All of my guest experiences were fine, but most were (understandably) fairly brief. These ones really stood out:
Emilie De Ravin was an absolute delight, and thanks to her hair billowing gently from a fan, also looked like something from a Wayne's World-esque vision. Trust the Aussie guest to be doing just fine in the heat while the rest of us melted. As everyone seems to agree, a truly gorgeous-looking signature. She chatted to me about Rian Johnson's first film Brick, and Michael Mann's Public Enemies. And she called me darlin', so yes, 10/10.
Gina Torres is a very pleasant and kindly supernatural being of some sort who remains completely unaffected while the cruel and uncaring sands of time wear the rest of us mortal creatures down piece by piece. Good for her.
Christina Ricci. Tied with Winona Ryder as my earliest crush. A brief encounter, but very nice, and such a key figure from my childhood thanks to various films. A few years ago Casper Van Dien signed my copy of Sleepy Hollow and said I should get the other actors on there, singling out Christina. I laughed at the very idea of it being possible. His wife even joined in. Johnny Rico from Buenos Aires, we should have never doubted you.
Jason Momoa's queue took... a wee while and I'd been led to believe from people's past encounters that due to sheer numbers he might barely even have time to look up, so I was happy enough to get a "How you doing, man?" "I'm good, man, how are you?" exchange out of it. But my best interaction came later in the day when a voice behind me suddenly apologised in that 'clearly trying to cut through here' sort of way. I moved instinctively and turned, realising only then that the person I'd moved for was Momoa (or, to quote the awestruck European man a few feet away, "It vas de Aquaman!"). That put a smile on my face. Then a short while later he came back the other way and apologised again ("Sooorrrry, guys!"). I like that I was an obstacle a member of the Justice League had to repeatedly overcome. Clearly good manners on the big fella, and I've been winding up the gals at work, so good stuff there.
Martin Sheen. Wow. What an absolutely wonderful man. I realised in his queue that my copy of Apocalypse Now had picked up some damage, which was disappointing and may haunt me forever, so I changed to a backup item, but my encounter with him was lovely. It looked like I was going to just scrape by as his last person of the day, but as he was signing he asked how many were left and said "Send them in, I declare". In the best possible way he really does carry himself with the air of an old school politician. Very respectful, humble, and pleasant, taking his time to ask people how they are and shaking hands. This one meant a lot.
Charlie Sheen is the only person I've ever seen become as frustrated by silver Sharpies as myself (truly the least reliable of Sharpie, but when they work they can look great), which amused and pleased me. Truth be told, I wasn't sure what to expect from him, and having had a few items marred with awful, barely visible signatures in the past, it was nice that he seemed to care. He switched pens about four times. Felt a bit out of place standing there holding a Platoon DVD in a sea of people with Two and a Half Men photos (never really watched the show). One of my favourite quotes from the day: "Argh! These frickin' pens are s#*t, man! I'm sorry! Is it okay? Are ya sure?"
Val Kilmer was an emotional one. So many films I've loved at different times of my life. My first ever big screen Batman, both as a childhood cinema outing and as an actual real life encounter. To see him in difficulty was upsetting, but he was making an effort and smiling, and it was an inspiration. I wish him the very best. And my copy of Heat looks great (gold Sharpie for the win, yo).
Oh, and Robert Picardo loves the first two thirds of Hail Caesar, but then he thinks it gets weird. Pass it on.
My last one was Robert Patrick. As I left he stopped me, switched to an icy T-1000 stare and told me to watch myself. Great to see someone having a bit of fun, and I now have the second film signed by him to put next to my copy of the original, signed by Michael Biehn.
Edit: I'd like to add that this was my first time coming to the big summer con. I came down from Newcastle on my own and without a coat on an overnight bus after work on Saturday, I don't know London well at all, and barring a few missed guests it was a very successful outing. And I accidentally wound up right outside Buckingham Palace after the event, so that was fun.