Dame Diana was signing Avengers shots and indeed other items -she was particularly taken by my ltd edition figure set and the 50th anniversary dvd box set!
As for personalisations, I count myself as one of the lucky ones. She was personalizing initially (as I saw other people's 8 x10's) but when I was queing after the 1.30 photoshoot, to my dismay there was a sign at the paying desk that stipulated "no personalizations", however when I got to the desk where she was signing, Dame Diana asked me what I wanted her to write and ofcourse I asked for a dedication which she was happy to do - most pleased with that!
I guess that because she arrived late, not sure exactly when but after 10.30am, the "no personalisations" was brought in to speed things up.
At a guess I'd say that the message for no personalisations hadn't reached the signing table when I got there, so about 2pm ish, so I was lucky in that respect.
I'd be interested to hear other people's thoughts on their meeting with Dame Diana...