I also met Keanu. I was walking down the street, when suddenly my sixth sense goes off as a I see a random guy walk past me.
Only seeing part of his face fully (weird angle plus he had facial hair) but I knew it was him, so I turned around and took a step and said "Hi, Mr. Reeves. I just wanted to say I'm a big fan of you and your work."
He turned to me and told me something along the lines of "Glad to here that. Its cool that you recognized me." And then he walked off. It was sweet.
I was at the Takashi Murakami opening at MOCA Geffen a couple years ago, and there were a reasonable number of celebrities, including Keanu Reeves, milling around, looking at art.
Everyone seemed to be doing a pretty good job of just letting them do their their thing. It was a really cool show, a good dj, lots of booze: who needs to harass famous people with all that going on?
Enter obnoxious lady. She is completely wasted, starts going up to (incredibly valuable) paintings and scratching at them with her fingernails. "See! just like my Louis Vuitton purse!" She notices that several people are staring at her in horror.
"No, don't worry, they're just prints." (they were all originals lent by private collectors and other museums) She wobbles off, and everyone goes back to looking at art, shaking their heads in disbelief. A minute later, she starts shouting across the room, "Keanu! Hey, Keanu!"
I turn around and she's draped herself over him, using him to steady her balance and demanding that his friend take her picture. When it became obvious that she didn't want just one, that she wanted to attach herself to his group of friends, he managed to disengage in the classiest, most polite way possible.
I didn't catch what he said, but he never raised his voice, and never acted offended that his personal space had been so thoroughly violated. He got her to leave without any fuss, and everyone was able to enjoy the museum in peace.
I live in Sydney, I didn't recognise him but i was having lunch with a friend who did and was a massive fan. She spotted him having lunch by himself but was too shy to say something/approach. So i did, he was very polite and charming, even to the point where he asked us what we did (students at the time), where & what we studied. etc
It was very nice of him to chat to us for a few minutes and sign an autograph.
Turns out he was in Sydney filming the matrix.
Some friends and I went to see Eddie Izzard do a one-night show in LA a couple years ago. We're standing in line outside the theatre to be let in, and this guy walks past us and I think "Wow, that looks like Keanu Reeves." He goes to the box office, gets his tickets, and walks back out past me again, and it's definitely Keanu Reeves. I was pretty stunned, because Keanu Reeves doesn't have to wait in line for anything in LA if he doesn't want to, but he stood out there with us for about half an hour.
Inside, he sat near us on the very end on the aisle, accompanied by a woman who I suppose was his date. He's really quite tall, at least 6' 1", and the woman behind him was very short. He realized this and asked her if she could see around him. She couldn't, so he scrunched down and asked "How about now?" and continued to do so until he was almost out of the seat. He ended up switching places with his companion so the woman behind him had a clearer view. We all thought that was pretty fucking cool.