It was mostly funny and the rest was a mix of romantic + thriller. There is one dialogue from the movie which left me thinking and nodding in agreement -
"Agar Kisi Cheez Ko Tum Dil Se Chaho Toh Poori Kaaynat Use Tumse Milane Ki Koshish Mein Lag Jaati Hai"
And the another great dialogue from the movie was "Hamari filmon ki tarah hamari zindagi mein bhi end tak sab kuch theek hi ho jaata hai. Happees Ending! Aur agar theek na ho to woh ‘The End’ nahin! Picture abhi baaki hai mere dost..."
I felt these lines give a very optimistic outlook towards life. And I liked them. Remember the first few lines from a song in the movie "1942 : A Love Story"? I so love them till date
"Dil na-umeed to nahi, na-kaam hi to hai,Aren't these such beautifully written lines? With so much depth and feeling? I remember whenever I would feel let down and low I would hum these lines and things would start to look better :)
Lambi hai gham ki shaam, magar shaam hi to hai.."
Coming back to Om Shanti Om, don't you think Shahrukh Khan has started to look old now? I haven't seen any of his movies lately besides this one so don't know how he looked in others but in this movie definitely he has started to show age on his face.