Mitch,
That is fantastic that you offer a unique and fun celebration, to be honest I have never done a gig that was the same as any other that I have done (in fact I can't see how it could even be done, unless you ignore the clients wishes and have a prepared set of music already to go that you use for every wedding)!
Every client is different and the interaction that a vendor has with each client will be different! Even the vendors mood on a given day will change the outcome of the event to a certain extent!
I guess for the most part my clients are those who want a DJ to play music at their event, for the most part that is what I do for a living! I also have a great baritone voice for making annouincements, if they want a clown I charge extra for that!
I don't offer photo montage, I don't offer games to bore and annoy their guest during dinner, I had a bride recently who specifically told me to please not do anything stupid during dinner, it seems she had been to a wedding recently where the DJ fancied himself as a game show host during dinner and it annoyed the heck out of everyone there! And she said, it made for the longest wedding reception she had ever been to!
But I imagine if I tried hard enough I could find a client who wanted these thing, I would charge a lot more for doing them though!