Just returned from the Manchester G-Mex which hosted Collectormania this weekend! It was the first time I had been to anything like that and it was brilliant!
Some of the guests were - Miranda Otto (LOTR - Eowyn), Michael Dorn (ST:TNG-Worf), Robert Englund (Freddy Kreuger), The A Team (Excluding Mr T), and many others.
I had the pleasure of meeting Joe Flanigan (Stargate Atlantis - Colonel Sheppard) and he was lovely - so friendly and funny to everyone he met. 
Can't wait for the next one - I'm hooked!