Ooh yeah, I forgot to mention, Billy Zane was really nice after Chicago. He seemed like he'd be full of himself (just MY own observation), but it was a relatively small crowd and he was very polite and nice about signing. My friend is a huge fan of his but couldn't make it up with me. I had one of his nice flyers with me and asked him to sign it. As he signed, I told him that about my friend. He paused, asked her name, and then personalized it to her with little peace-love-happiness symbols. I thought that was a very lovely thing to do.
Raul Esparza's great with faces. I had one of the happiest actor experiences of my life, thanks to him

I never once saw Molly Ringwald sign. Not a particularly nice lady (and NOT just b/c of that). I was disappointed that Jennifer Jason Leigh snuck out a back door after Proof. There was practically nobody there...I didn't want anything from her, I just wanted to speak to her for a brief minute b/c I was so overwhelmed by the show and her performance. Oh well. After some past rude actor experiences, I'd rather have no encounter than a potential bad one.
I also can't emphasize enough how wonderful Neil Patrick Harris was (another good one with faces). The second time I met him, I was one of the only people out there...he kinda hugged me and we had a long conversation in the freezing cold, even with his friends waiting by the car.
Lately, Alan Cumming's been a little weird with fans, but the first time I met him (after Design for Living) was the absolute best. He was my first celeb and I was dying. My friend had already met him a few times by then, so he knew her. In a nutshell... He responded to every fan and saved us for last. He said hi to us, told us to wait, and put his mom in a cab (she was going back to Scotland). Then his boyfriend and friends waited up by his car while he talked to us for a really long time. He told my friend how he saw her website for him, how he saw mine, chatted about other things, and then did the whole autograph/pic bit. It was, for lack of a better word, simply amazing. In fact it may have been awesome.

I was spoiled for any other encounters from that point forward.