8.5/10 for me, a very good movie, and Marvel's best since Spiderman 2, but in my personal opinion people saying this is the best Marvel movie are crazy.
The acting is great, and i didnt spot any poor lines either, but the action was lacking IMO, and i was very dissapointed with him revealing himself at the end. The movie also had some great emotional scene's and some good character development, especially for Stark and Obidiah, but something i cant put my finger on, just stops the movie from being up there with the best IMO. It didnt seem to have the verve and emotional investment of the first 2 Spiderman movies, nor the drama and social commentary of the first 2 X-men movies (X2 is leaps and bounds better than IM IMO), and the movie simply, for me personally, just doesnt have the resonance or deepness of movies like Batman Begins, Superman Returns and Hulk (yes i know i will get some stick for the last 2). It didnt even have the coolness factor, action or epicness of Transformers. And IMO the likes of the excellent HellBoy, Sin City, The Crow and V4V are above IM as well.
BUT, IM is itself leaps and bounds ahead of the likes of X3, the FF movies, Elektra and Blade: Trinity, its also a lot better than the ones like Ghost Rider, Daredevil: DC and The Punisher that i personally liked.. And Robert Downey Jnr is possibly the best suited leading man in a CB movie yet, he was just awesome, and all the hints to the sequel and CB mytho's were awesome and very welcome.
In conclusion, Marvel has gotten off to a good start, but not a great one, quality wise. I will be updating my sig tomorrow as IM does make it into my top 15.
Also, on a personal note, looks like a scene i suggested to Favreau in the suggestions thread made it into the movie, how awesome is that!