Om Shanti Om is very nicely done, funny movie. Its about as nice as a cherubic little friend who makes your acquaintance, or a nicely satisfying backrub after a tiring day at the office.
So there. I don't have anything even mildly sarcastic to say about it.
When I was little I had a cassette tape of Naseeb, and my favorite song which I repeated ad nauseam, was John, Jaani, Janardan. OSO is the kind of movie that little kids today will grow up with, they will know the dialogues and the songs and 30 years from now, pot-bellied and balding, as they gather round for a few drinks and some pakoras, some of them might even trade a few laughs by reminiscing about it for old times sake.